(CNN) -- The 5-year-old girl found the note tucked inside a plastic bag and left in a basket used as a flower pot.



April Tinsley, 8, abducted in Fort Wayne, Indiana, was raped and killed 21 years ago. The case was not solved.



"Hi Honey I Been watching you," it said. "I am the same person that kidnapped an Rape an kill Aproil tinsely here is a present foR yo you are my next vitem."



A used condom was stuffed in the bag alongside the note.



It was March 2004 -- nearly 16 years after 8-year-old April Tinsley was abducted from a Fort Wayne, Indiana, neighborhood, raped and killed.



Her killer remains at large, and police believe he has surfaced several times, scrawling a message in crayon on a barn in 1990, then leaving four chilling notes for children in the Fort Wayne area years later.



Indiana authorities are now asking an FBI task force -- the Child Abduction Response Deployment (CARD) team -- to help take a fresh look at the case.



"Investigators believe the case is 'highly solvable,' and after 21 years, their desire to bring April Tinsley's killer to justice is stronger than ever," the FBI said.



CARD teams were created three years ago, aimed at bringing together "a variety of experts in child abduction cases who could quickly respond on the ground to help local authorities with time-sensitive investigations," the FBI said.



While CARD responds to abductions and disappearances, the team also works cold cases, like April's, the agency said. "As team members discovered, there is enough evidence -- including notes, pictures, and DNA left by the killer years after the murder -- to make investigators hopeful they can break the case."



The team includes behavioral profilers, agents and analysts from the FBI's Crimes Against Children Unit and coordinators and representatives from the National Center for the Analysis of Violent Crime and the Violent Criminal Apprehension Program.



April Marie Tinsley was playing outside with friends on Good Friday, April 1, 1988. As the three girls were moving from one friend's home to another's, the first-grader realized she had left her umbrella behind and went back to get it.



She never returned. Her body was found three days later, in a ditch some 20 miles northeast of the Tinsley home. April's body was clothed, but an autopsy showed she had been raped and suffocated.



Two years later, a teenage boy called police to report a message scrawled in crayon and black marker on the front doors of a barn about 10 miles from April's home. He never saw the writer, according to the TV program "America's Most Wanted," which profiled the case in May, but each day noticed the print was getting darker and more pronounced.



Although the message was hard to read, the person wrote he had killed April, and that he would kill again. Crayons were left behind at the scene, "America's Most Wanted"  said on its Web site. Police attempted to conduct forensic analysis on them, but came up empty.



Then, in spring 2004, the four notes appeared at various Fort Wayne homes, several of them placed on bicycles that young girls had left in their yards. All the notes were written on lined yellow paper and placed inside plastic bags along with used condoms or Polaroids of the killer's body, the FBI said. Several notes referred to April.



Authorities have reason to believe the writer of the 1990 note also left the notes 14 years later, Fort Wayne police said. "That tells us that the person's still around, still out there," said Fort Wayne police Capt. Paul Shrawder.



"It's definitely very odd," he added. "Even the FBI is puzzled by the behavior, that the letters would come out so many years later and then nothing again."



DNA evidence was recovered from April's body and from the condoms, Shrawder said. While police have no one to match it with
Where was the confession found? How many notes believed to be by the killer surfaced in 2004? In what year did the writer claim responsibility for the slaying in a barn door message? How many notes, believed to be from the killer, have surfaced in 2004? What did the fbi say? What year was April Tinsley abducted? In what year was April Tinsey abducted?
tucked inside a plastic bag and left in a basket four 1990, four "Investigators believe the case is 'highly 1988. 1988.
question: Where was the confession found?, answer: tucked inside a plastic bag and left in a basket | question: How many notes believed to be by the killer surfaced in 2004?, answer: four | question: In what year did the writer claim responsibility for the slaying in a barn door message?, answer: 1990, | question: How many notes, believed to be from the killer, have surfaced in 2004?, answer: four | question: What did the fbi say?, answer: "Investigators believe the case is 'highly | question: What year was April Tinsley abducted?, answer: 1988. | question: In what year was April Tinsey abducted?, answer: 1988.