On the evening of April 19, 2010, a burst of gunfire on Irma Street in Dorchester left 22-year-old Troy Nock fatally wounded. He was found suffering from a gunshot wound at about 6:56 p.m., taken to Boston Medical Center, and pronounced dead shortly after arrival. The Boston Police Homicide Unit opened an investigation, canvassed the neighborhood, and urged residents to provide information, including anonymous tips.

Despite those efforts, the case grew cold. Troy Nock’s killing remains listed among the Boston Police Department’s unsolved homicides for 2010; no arrests or suspects have been publicly identified. If anyone in Dorchester that night saw or heard something that could help bring answers, please come forward and share what you know.