Peel Regional Police have arrested and charged a third person in the death of an up-and-coming MMA fighter who was shot while trying to stop an armed robbery during a charity poker game last year.

Kearn Nedd, 28, died in hospital after he was shot at the Rozz Banquet Hall in Brampton on April 16, 2011.

Police said two masked men carrying firearms burst into the hall and fired several shots in a botched robbery attempt. More than 130 people were inside the hall for the afternoon tournament at the time of the robbery.

Nedd was shot after a scuffle with one of the gunmen. Police said he was acting as a Good Samaritan, as he ran to assist the organizer who was being attacked by the gunman.

Police allege that both masked gunman fired their weapons at Nedd during an altercation.

The suspects then escaped from the hall and fled to a waiting vehicle.

Nedd, who was a rising star in mixed martial arts, was taken to Brampton Civic Hospital where he died of his injuries.

Peel police said Tuesday that Kmar Kelly, 21, of Toronto, has been charged with second-degree murder.

He is scheduled to make his first court appearance on Tuesday.

A 15-year-old boy, who was 14 at the time of the incident, has previously been charged with second-degree murder in the case.

Another man, Samir Abdelgadir, 30, was charged with accessory after the fact to murder.

Peel Regional Police say the investigation is ongoing and believe there are others with various levels of involvement in the case.

Homicide investigators are asking anyone who was present at the shooting, or who may have information, to contact officers at 905-453-2121, ext. 3205.