Possible Dudley Square murderer photographed by bus camera system

UPDATE: Arrest made.

Boston Police have released photos of a man they say is a "person of interest" in Wednesday's stabbing death of Rashad Barnes at a Dudley Square bus stop.

Police say the killer and Barnes got into an argument on a 23 bus that ended at Kearsarge and Warren streets when the man repeatedly stabbed Barnes.

If the guy looks familiar, contact homicide detectives at 617-343-4470 or the anonymous tip line by calling 800-494-TIPS or texting TIP to CRIME (27463).

The president of Brigham and Women's Hospital remembers Barnes.