MISSISSAUGA, Ont. - A 20-year-old Toronto woman has been charged in the killing of a Mississauga, Ont., teenager.

Police say Cassandra Elizabeth Scavone was arrested on Friday and charged with accessory after the fact of murder in the slaying of 17-year-old Adrian Ducas on July 3.

Police say Ducas was involved in a basketball game at the Malton Community Centre, when three suspects entered, an altercation took place and Ducas was shot.

Twenty-year-old Kevaughn Tulloch and 23-year-old Maurice Raphael have already been arrested and are charged with first-degree murder.

Police have also obtained a Canada-wide arrest warrant for 20-year-old Christopher Raphael.

Scavone remains in custody and will appear in court on July 23.