HPD doesn't anymore. Federal Detention Center at the Daniel K. Inouye International Airport replaced that request by Feds. When I was with Vice Morals/Gambling, always invited INS along. They were a great resource. Asians think local cops are stupid, play the " I don't know English ! " Soon as the INS guy came in, "cry...cry...cry...then squeal ...squeal... squeal.."  That  is a real example of police cooperation between INS and local cops. That's how you get people to cooperate.  Sanctuary City's are going to short change themselves, both in resources and information on combatting organized crime in the immigrant community. Lots of their crimes are confined to their culture and they don't trust outsiders. They fix the problem amongst themselves always has been, currently is, and will be in the future. Muslims are no different. In Dearborn Michigan there is large population of Lebanese, some are O.C. and send money home to Hezbollah like the Irish did for IRA. Crime pays for the war.