A former MBTA Transit Police officer was sentenced to six months in jail Monday for beating a woman and then leveling several false accusations against her in a report, according to the Suffolk District Attorney’s office.

Prosecutors said Jennifer Garvey, 34, had handcuffed an intoxicated bus rider at Dudley Square Station in March 2014 when a bystander who recognized the bus rider from her commute expressed concern over how forcefully Garvey was treating her.

Garvey told the bystander to leave or be arrested for interfering with the investigation. The woman took down Garvey’s badge number and called 911, according to prosecutors.