Convictions voided because of NYPD Detective's misconduct

Because of serious misconduct by a NYPD homicide detective,  a NY judge voided the murder convictions of 3 men.  Fortunately, none were executed although one died in prison. The detective, now retired, repeatedly used a very questionable informant as a witness.  Research shows this is often the cause of convicting the innocent and/or denial of a fair trial.