Matthew Tucker, a 24-year-old African-American man, was shot and killed on Klaus Street in Buffalo, New York, on December 24, 2014. He was found with gunshot wounds just before 10:30 p.m., and his death turned a holiday evening into a scene of grief for friends and neighbors.

In the days after the killing, friends and family held a vigil at the location where Tucker’s life was taken. The Buffalo Police Department sought the public’s help during the initial inquiry, but no suspects have been publicly identified and no arrests have been announced. The case remains open and unsolved.

If anyone has information about Matthew, where he was that night, or the events on Klaus Street around 10:30 p.m., please come forward. Who might have seen or heard something that Christmas Eve?