A West Sacramento man was sentenced to 25 years in prison this week for robbing victims in a scam that involved him posing as police officer.

A Yolo County Superior Court jury in August found 53-year-old Roberto Montalvo guilty of four felonies and three misdemeanors arising from a pair of robberies in which Montalvo posed as a police officer to rob his victims.

During the trial, witnesses testified that Montalvo’s girlfriend, Alicia Ortega, offered to perform services as a prostitute. Then Montalvo would show up acting like he was a police officer, according to a news release from the Yolo County District Attorney’s Office. Ortega pleaded guilty to one county of robbery in exchange for a 10-year prison sentence.

The jury convicted Montalvo of robbery in the first degree, robbery in the second degree, burglary in the first degree, possession of crack cocaine, two counts of impersonating a police officer and possession of drug paraphernalia. Montalvo has prior convictions for aggravated kidnapping and aggravated robbery from Illinois.