Watch Lethal Weapon 3 (1992) HD Full Movie Free on solarmovie.do. Watch Lethal Weapon 3 (1992) online free. Martin Riggs and Roger Murtaugh pursue a former LAPD officer who uses his knowledge of police proced...Martin Riggs and Roger Murtaugh pursue a former LAPD officer who uses his knowledge of police procedure and policies to steal and sell confiscated guns and ammunition to local street gangs.