The victims were killed during an attempted drug robbery in the upscale apartment complex in 2009. Katoya Jones was caught on tape giving the gang access to the building.
According to the Philadelphia Police Department, Officer Jonathan Garcia, 23, was arrested after selling heroin to an undercover FBI informant.
Lead defendant Keith Epps, gunman Antonio Wright, and co-defendant Edward Daniels will all spend the rest of their lives in prison with no chance of parole.
If found guilty, all the defendants face mandatory life prison terms without chance of parole.