Police say Thomas Wortham IV was was shot and killed when several people approached him outside his family's home on Chicago's South Side and tried to steal his new motorcycle.
Police say Wortham's father - a retired Chicago police officer - came to his son's aid and shot two of the attackers, one fatally. The injured suspect is hospitalized.
Weis says a third suspect turned himself in Thursday. A fourth suspect remains at large. Authorities say those suspects fled after the shootings.
Wortham joined the Police Department in 2007.