NEW : Reward offered in officer 's death . The officer identified as John Flisk . A lab lab technician is fatally shot along with another man , police say . The Chicago Police Memorial Foundation offered a $ 10,000 reward late Saturday for information leading to the arrest and conviction of whomever killed Flisk . A gunman is being held ; no details on the circumstances of the shooting have been released .
NEW : Reward offered in officer 's death . The officer identified as John Flisk . A lab lab technician is fatally shot along with another man , police say . A gunman is being held ; no details on the circumstances of the shooting have been released .