Jamie Lee, 29, known in Boston’s hip-hop community as Roc Dukati, was fatally shot after a mixtape pre-release party at the former Underbar nightclub. On March 2, 2011, an altercation on Tremont Street escalated into gunfire that struck Lee and a companion; both drove themselves to a nearby hospital but Lee’s wounds proved fatal. He was a father to a young son.

Two men — 26-year-old Andrew Flonory of Brockton and 22-year-old Joshua Hollis of Cambridge — were arrested on weapons charges in the immediate aftermath, but neither was charged in connection with Lee’s death. Investigators say the shooting occurred in a busy public area, yet police encountered widespread unwillingness to cooperate, a factor they blame for the case remaining unsolved.

Does anyone who remembers that night or who knew Jamie or witnesses on Tremont Street have information to share with investigators?