update: The driver of the speedboat that killed British pop vocalist Kirsty MacColl [ tickets ], 41, was bailed out of jail on Friday (12/22).

Jose Cenyam was held by police in Cozumel, Mexico, after his boat fatally hit MacColl on Monday (12/18) while she swam with her teenage sons. A spokesperson for Mexico’s attorney general told BBC News that he was bailed because the case is being treated as a negligent homicide.

The investigation into the incident will focus on whether or not MacColl was in an area reserved for swimmers when she was killed.

MacColl, the daughter of folk singer Ewan MacColl, released her latest album, "Tropical Brainstorm," in March. She is best known for her vocals on other artists' songs, including Morrissey's "Interesting Drug," the Pogues' "Fairytale of New York" and contributions to recordings by the Rolling Stones, Billy Bragg and Simple Minds.

The singer first began her career as the frontwoman for punk group the Addix in the mid-'70s. She released her first single. "They Don't Know," in 1979.