The city of New York has given an emotional final salute to a rookie police officer gunned down with his partner a week ago. A funeral Mass for Jason Rivera was held Friday morning at St. Patrick's Cathedral. Mayor Eric Adams, who is a retired police captain, says he sees an echo of himself in the slain officer who had joined a department he had seen as flawed in hopes of improving it. The 22-year-old Rivera was recently married and barely into his second year on the force. He and Officer Wilbert Mora were fatally wounded when a gunman ambushed them in an apartment as they responded to a family dispute. During the funeral service, New York City Police Commissioner Keechant Sewell posthumously promoted Rivera to the rank of Detective First Grade.