LAPD Sheriff's Det Richard Valdemar on "Psycho" Mike Robinson being a trusted informant for the FBI, LAPD and LA County Sheriff's Office for 15 years.
In June of 2005, Times staff writer Chuck Philips wrote an article in which he identified my informant, Michael Robinson, by his gang moniker "Psycho Mike." Robinson was a Compton Lantana Block Crip and a Black Guerrilla Family associate who had defected from the gang in prison. Michael Robinson had become a reliable gang informant who had testified in federal court against the "Bounty Hunter Bloods" and worked as an informant for the Los Angeles County Sheriff Department's Major Crimes Bureau for more than 15 years.
https://www.policemag.com/blogs/gangs/blog/15318091/a-jaundiced-eye-and-blood-red-ink