In "Lethal Weapon," Riggs' wife, Victoria, was killed in a car accident caused by a drug dealer named Mr. Joshua, who was trying to intimidate Riggs. The incident deeply traumatized Riggs, contributing to his reckless behavior and suicidal tendencies at the beginning of the film. The tragedy serves as a key element in Riggs' character development and motivation throughout the series, as he grapples with his loss and seeks justice against those responsible for the pain he endured.

"Lethal Weapon" was released on March 6, 1987. Mel Gibson was born on January 3, 1956. This means he was 31 years old at the time of the film's release.

Yes, "Lethal Weapon 4," released in 1998, is the last film in the original "Lethal Weapon" series. It concluded the story of detectives Martin Riggs and Roger Murtaugh, played by Mel Gibson and Danny Glover. Although there have been discussions about a potential fifth installment over the years, as of now, "Lethal Weapon 4" remains the final entry in the franchise.

"Lethal Weapon 2," released in 1989, is widely regarded as a successful sequel to the original film. It features the same dynamic duo, Riggs and Murtaugh, played by Mel Gibson and Danny Glover, and combines action, humor, and character development effectively. The film introduces new elements, such as a South African drug cartel and a memorable villain, played by Joss Ackland. It balances action sequences with comedic moments and emotional depth, contributing to its popularity. Overall, it is considered one of the better action sequels of its time.