Joe Eszterhas originally titled the screenplay "Hearts of Fire". Columbia disliked the title and decided it had to be changed. They assigned a secretary at the studio to go through the script in an effort to come up with another title. The secretary found "jagged edge" in the description of the murder weapon: "a knife with a jagged edge". Eszterhas and director Richard Marquand would still get to use the original title when they collaborated again on 1987's Hearts of Fire (1987).
After court,Glenn Close and Jeff Bridges are on top floor of a parking garage. Parking garage located by Fisherman's Wharf. This parking garage
is miles away from the Court buildings which are located in the Civic Center
The title "Jagged Edge" refers to a murder weapon, a hunting knife with a blade that has a serrated (or jagged) edge.
Is there an alternate ending for this movie?
Although several people claim to have seen an alternate ending for this movie by the time it was released in cinemas, back in 1985, there's no actual prove that the studio shot or released any ending different from the one we saw in the picture.
Also, writer Joe Eszterhas said in his book that he fought to keep the original ending, the one that shows Jack Forrester as the killer. According to some viewers, in the alternate ending, the tennis pro Bobby Slade is the killer and Jack Forrester is the one who comes later to rescue Teddy, instead of Sam.
It's possible that some viewers got confused and mixed the characters faces, creating this "urban legend".