Who do you believe in a case like this? Where one cop is on trial and a former cop testifies against him, expecting a reduced sentence for his own misdeeds?

A former Chicago police officer testifying against an officer on trial for robbing drug dealers as part of a corrupt ring of Englewood cops was challenged in federal court Tuesday about his own history of crimes.

Corey Flagg testified that he shook down dealers for narcotics and cash while he was on a team of tactical cops, just as defendant Eural Black is accused of doing.

Black's lawyers went for blood as they cross-examined Flagg:

Flagg, who also has pleaded guilty to his role in the conspiracy, was quickly attacked by defense lawyers and accused of having no credibility. Instead of a potential life term, Flagg could serve just 10 years in prison or even less for helping the government, they pointed out.

Flagg admitted that he expects to get a deal even though he acknowledges taking part in armed robberies, home invasions, falsifying police reports and lying to judges and grand juries while he was with the department.

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