Glenn Edwards is a drug offender who was sold out by one of his affiliates, James Foley, who had become a police informant. Edward also knew that Foley was one of the two real killers of gangster David Gale, a case that led to the wrongful convictions of Larry Martin and Bobby Campbell, who were in the same prison as Edwards.
Edwards relayed his knowledge to Bobby's brother Luke, which resulted in Luke killing Foley in a fight during his attempt to seek further information. Edward later told the detectives what he knew. (L&O: "Myth of Fingerprints")