Roy Rivera, a 24-year-old Hispanic man from Fitchburg, Massachusetts, was shot and killed on the evening of May 12, 2015. The shooting occurred on Milk Street near Allston Place. First responders found Rivera slumped over the steering wheel of his car; he was given CPR at the scene and taken to a hospital, where he was pronounced dead from an apparent gunshot wound.

Investigators treated the killing as connected to an illegal drug transaction rather than a random act. Authorities arrested 28-year-old Andrew Mathieu of Leominster on May 19, 2015, charging him with murder and carrying an unlicensed firearm. Prosecutors later said Mathieu had driven to Fitchburg with his girlfriend and their 7-year-old child to buy heroin; an argument with Rivera allegedly culminated when Rivera struck Mathieu with a bottle and Mathieu shot Rivera. Rivera reportedly drove a few blocks after being shot before succumbing to his injuries.

In October 2016 Mathieu pleaded guilty to manslaughter and received a 17-to-19-year prison sentence. Three others faced accessory charges and a fourth was charged with firearms offenses and receiving stolen property. If anyone knew Roy Rivera or has information about what led to the shooting, please share what is known.