Dennis M. Crosby apparently shot himself to death, the second son of Bing Crosby to commit suicide, officials say. He was 56.

Crosby was found dead in his home late Saturday by his roommate, the sheriff's office said. He suffered an apparently self-inflicted shotgun wound to the head.Dennis Crosby was one of four sons born to Bing Crosby and his first wife, Dixie Lee Crosby.

Lindsay Crosby, the youngest son, shot himself to death in 1989 in Southern California at age 51.

Bing Crosby's eldest son, Gary, portrayed his father as often cold and heartless. He said he grew up in a "house of terror."

Dennis' twin brother, Philip, criticized Gary as a "crybaby," but Dennis said that Gary got the severest treatment from their father.