He was survived by his parents.
Officer Carroll was accidentally shot and killed by his partner while the two officers chased a suspected burglar. The officers were in plainclothes driving on Minerva Street when they spotted the man and pulled up next to him. The man gave his name and then fled, with both officers in pursuit. As the suspect came around a corner Officer Carroll's partner fired two shots. The second shot struck Officer Carroll as he rounded the corner behind the suspect.
In addition to his police service Officer Carroll was a WWI veteran of the 138th Infantry.
There are currently no tributes for Police Officer William C. Carroll.