Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: (CNN) Dr. Walter Palmer is nowhere to be found. 
  
 The Minnesota dentist has gone underground in the onslaught of criticism after he killed a prized African lion named Cecil. 
  
 It probably shouldn't come as a surprise; an angry horde of Cecil supporters is calling for his head to be mounted on a wall. 
  
 Meanwhile, the U.S. Fish and Wildlife Service is investigating the circumstances surrounding the lion's killing. 
  
 "At this point in time, however, multiple efforts to contact Dr. Walter Palmer have been unsuccessful. We ask that Dr. Palmer or his representative contact us immediately," said Edward Grace, the service's deputy chief of law enforcement. 
  
 #CecilTheLion #CNN reporting Dr. Palmer seeking to cooperate. EZ to do. U or ur representative please contact #USFWS immediately. — Dan Ashe (@DirectorDanAshe) July 30, 2015 
  
 CNN knocked on the door of his Minneapolis home, but no one answered. 
  
 His practice, River Bluff Dental, is shuttered, at least for now. A memorial of plush animals piles up at the door. 
  
 In a letter dated July 28 to his patients, Palmer said the hunting controversy "has disrupted our business and our ability to see our patients." 
  
 "For that disruption, I apologize profoundly for this inconvenience and promise you that we will do our best to resume normal operations as soon as possible," he said in the letter obtained by CNN affiliate WCCO. 
  
 Out of his hide 
  
 As Palmer went into hiding, it appeared the Internet world was at his doorstep with pitchforks and torches. 
  
 The website for the dental practice is no longer available online. 
  
 Online reviews are trashing his business. 
  
 The hashtag #WalterPalmer is being used to pepper him with threats and insults. 
  
 What's the uproar about? 
  
 Palmer is in the public crosshairs after the Zimbabwe Conservation Task Force said Cecil the lion was lured out of an animal sanctuary in Zimbabwe and shot with a crossbow. 
  
 But his death wasn't immediate. 
  
 Cecil lived another 40 hours until the hunters tracked him down and shot him with a gun. He was then skinned and beheaded. 
  
 The hunters also tried to destroy the GPS collar that Cecil was wearing as part of research backed by Oxford University, the conservation group said. 
  
 JUST WATCHED Cecil the lion's killer thought hunt was legal Replay More Videos ... MUST WATCH Cecil the lion's killer thought hunt was legal 01:52 
  
 "I had no idea that the lion I took was a known, local favorite, was collared and part of a study until the end of the hunt," Palmer said Tuesday in a statement. "I relied on the expertise of my local professional guides to ensure a legal hunt." 
  
 Two Zimbabweans have been charged in the case and officials in the African nation say they want to talk to Palmer. The undercover dentist has indicated that he'll cooperate, although he said in a statement that he had yet to be contacted by anyone about the investigation. 
  
 The killing garnered international attention. 
  
 "I think like most people in the world, we are outraged at what happened to this poor lion," Harald Braun, Germany's ambassador to the United Nations, told reporters Thursday. 
  
 Braun spoke minutes after the U.N. General Assembly passed a resolution calling on all countries to crack down on illegal wildlife trafficking and poaching. The vote came after two years of work on the resolution and was not tied to Cecil's death. 
  
 Cecil's killing doesn't appear to be the first time Palmer has gotten into trouble while hunting. 
  
 A man by the same name and age, and from the same town, illegally killed a black bear in Wisconsin several years ago, according to court documents. 
  
 That individual pleaded guilty to making false statements knowingly to the U.S. Fish and Wildlife Service, and was sentenced to one year on probation and ordered to pay a fine of nearly $3,000, records show. 
  
 A New York Times article in 2009 that profiled Palmer and his hunting methods said he had served a year of probation over the false statements case. 
  
 The Times article detailed Palmer's skill and enthusiasm for using archery rather than firearms to slay animals. 
  
 He is "said to be capable of skewering a playing card from 100 yards with his compound bow," it said, recounting his killing of a large elk with an arrow in Northern California. 
  
 Outside the office 
  
 The mood outside River Bluff Dental was peaceful but ugly Wednesday. Hundreds of protesters gathered there, WCCO reported. 
  
 "I just came down here to express my disgust at what he did," Alan Miller told the station. 
  
 Sarah Madison brought her son, dressed in a lion costume. "I said we're going to come and we're going to honor Cecil's life." 
  
 #CecilTheLion protestors come in all shapes & sizes at the dental office of big game hunter Walter Palmer. pic.twitter.com/4kAoWfgiJl — Paul Blume (@PaulBlume_FOX9) July 29, 2015 
  
 Above the menagerie of stuffed animals at the door, posters now cover the front facade of the practice. 
  
 One sign asked, "Dr. Palmer, why did you kill Cecil?" Another said, "Rot in hell." A third employed the hashtag #catlivesmatter. 
  
 The vitriol for Palmer even flowed from the governor's mansion. 
  
 "I'm just so disgusted with that man," said Gov. Mark Dayton. "Shoot any lion but lure a lion like that out of the preserve and shoot him, how could anybody think that's sport? Just appalling." 
  
 And the mood in the area of Palmer's home, in Eden Prairie, was dicey enough for police to issue a statement saying they were protecting the area -- although Palmer could fend for himself. 
  
 "Because of the increased traffic in the neighborhood of Walter Palmer's residence, the Eden Prairie Police Department is monitoring the neighborhood to ensure the safety and security of the residents and their property," the statement read. "The Eden Prairie Police Department is not providing personal protection for Mr. Palmer." 
  
 With the storm of criticism continuing to brew, it may be quite some time before the hunter, now hunted, feels like it's safe to come out. ||||| The WhiteHouse.gov petition calling for the extradition of Walter Palmer, the Minnesota dentist who recently admitted to killing Cecil the Lion in Zimbabwe, has surpassed 100,000 signatures, meaning the White House will have to respond to the petition. 
  
 “We urge the Secretary Of State John Kerry and the Attorney General Loretta Lynch to fully cooperate with the Zimbabwe authorities and to extradite Walter Palmer promptly at the Zimbabwe government's request,” the petition reads. 
  
 The petition was started on July 28 and currently has over 140,000 signatures. 
  
 White House Press Secretary Josh Earnest said the petition has “reached the threshold” that would warrant a response but did not offer a time frame. He did note that decisions about prosecution and extradition are made at the DOJ. 
  
 The U.S. Fish & Wildlife Service, which has offered assistance to Zimbabwe in its investigation, has asked Palmer to contact them "immediately." 
  
 "The U.S. Fish & Wildlife Service is investigating the circumstances surrounding the killing of 'Cecil the lion,'" the agency told ABC News in a statement today. "At this point in time, however, multiple efforts to contact Dr. Walter Palmer have been unsuccessful. We ask that Dr. Palmer or his representative contact us immediately." ||||| 16th Director of the U.S. Fish and Wildlife Service, serving from June 10, 2011 to January 20, 2017. This account is archived and no longer updated. 
  
 Washington, D.C. ||||| Sarah Madison (L) holds her son Beckett, 3, as her daughter Quinn, 5 (in costume), look at stuffed animals at the doorway of River Bluff Dental clinic in protest against the killing of ''Cecil'' a famous lion in Zimbabwe, in Bloomington, Minnesota July 29, 2015. 
  
 The killing of Cecil the lion in Zimbabwe by American dentist and trophy hunter Walter Palmer is being investigated by the U.S. Fish and Wildlife Service to see if it was part of a conspiracy to violate U.S. laws against illegal wildlife trading, a source close to the case said. 
  
 The service is probing the killing under the Lacey Act, which bars trading in wildlife that has been illegally killed, transported or sold, the source said on Thursday. 
  
 Palmer, whose practice is in suburban Minneapolis, has admitted to killing the 13-year-old lion and tourist attraction, in July. Questions have been raised by the Zimbabwe government and animal conservationists about Cecil's death outside the Hwange National Park, where he was the head of two lion prides. 
  
 The best known lion in Zimbabwe is said to have been lured from the park with bait, shot with an arrow, tracked for 40 hours, shot dead with a rifle and then beheaded and skinned. 
  
 Cecil was wearing a GPS collar as part of a research project run by Oxford University. 
  
 DRIVE TO END ILLEGAL TRADE 
  
 The Obama administration has made a major push to combat wildlife trafficking, issuing a national plan earlier this year to address it and cracking down on domestic trade in African elephant ivory. 
  
 With some of the strongest laws in the world to protect endangered species, the U.S. government has attempted to prevent the slaughter of such animals internationally by targeting the multibillion-dollar market for illegal wildlife items. 
  
 In 2014, the service proposed listing the African lion as threatened under the U.S. Endangered Species Act. The proposal, which is being finalized, would create a permit process for importing lion trophies from countries that properly manage the species. 
  
 Estimates vary on how many lions are left in Africa, with a low end of fewer than 20,000. There has been a significant decline in the African lion population over the past 20 years. 
  
 The Lacey Act can be used to prosecute anyone who violates wildlife protections under the Convention on International Trade in Endangered Species (CITES). 
  
 The African lion is protected under CITES, which requires exporters of the animal to get a permit from its home country. The lion or its parts cannot be imported into the United States unless it meets CITES requirements. 
  
 GOVERNMENT SEEKS HUNTER 
  
 Separately, the Fish & Wildlife Service said it has been unable to contact Palmer. 
  
 Edward Grace, deputy chief of law enforcement for the service, issued a statement urging Palmer to immediately contact the agency. 
  
 A Florida newspaper reported on Wednesday that reporters had gathered around a $1.1 million home in southwest Florida thought to belong to Palmer. It was unclear whether he was there or even in the United States. 
  
 Cecil's death has sparked global outrage, with intense social media reaction against Palmer, protests outside his practice, and calls for him to be extradited to Zimbabwe to face poaching charges. 
  
 The White House said on Thursday it would review a public petition to extradite Palmer, noting it had exceeded a required 100,000 signatures. White House spokesman Josh Earnest said it would be up to the U.S. Justice Department to respond to an extradition order. 
  
 In a Twitter post on Thursday, Fish and Wildlife Service director Dan Ashe called the killing tragic and said his agency would "go where facts lead" in its investigation. 
  
 A local hunter has been charged in Zimbabwe with failing to prevent the unlawful killing of the lion. It has been reported that Palmer was with the other hunter and a local farmer during the hunt and that it took place without proper permits and at night. 
  
 Palmer has not been charged in Zimbabwe or the United States. 
  
 The Obama administration has pushed for tougher penalties for wildlife trafficking crimes and aggressively pursued groups involved in the trade. 
  
 In a high profile case last year, the U.S. government indicted a South African company for selling illegal rhinoceros hunts to Americans and secretly trafficking in the endangered animals' horns. 
  
 Over the past three years, the U.S. government has made more than 30 arrests involving the rhino horn trade. The government has seized more than $2 million in cash and $1 million in gold as a part of this effort. 
  
 (Editing by Kevin Drawbaugh, Bill Trott, Toni Reinhold) |||||
Output:
A WhiteHouse.gov petition clamoring for the extradition of lion-killer Walter Palmer to Zimbabwe has passed the all-important threshold of 100,000 signatures. What the upward of 150,000 people to have signed it want: "We urge the Secretary Of State John Kerry and the Attorney General Loretta Lynch to fully cooperate with the Zimbabwe authorities and to extradite Walter Palmer promptly at the Zimbabwe government's request." In garnering at least 100,000 signatures, the White House will now have to respond. ABC News reports White House Press Secretary Josh Earnest acknowledged on Thursday that a response would come but gave no time frame. Earnest did point out that extradition falls under the purview of the Department of Justice. But it's an agency within the Department of Interior that's thus far involved. The US Fish & Wildlife Service is looking into Cecil the lion's killing, with Reuters reporting by way of a source that it's doing so under the Lacey Act, which prohibits illegal wildlife trading. The only thing is, the agency can't find Palmer. Director Dan Ashe today tweeted, "USFWS is investigating the tragic killing of #CecilTheLion. Will go where facts lead. Efforts to contact Dr. Palmer so far unsuccessful." He then followed that up two hours later with, "#CNN reporting Dr. Palmer seeking to cooperate. EZ to do. U or ur representative please contact #USFWS immediately." CNN reports it knocked on Palmer's door in Minneapolis, to no avail.