Le Jour Se Lève

Spoiler Alert!

The despicable Valentin, a pathological liar, goes to the apartment of François armed with a pistol with which he claims to have intended to kill him over their shared romantic interest, Françoise. Instead, he tosses the pistol aside. François later impulsively picks it up and fires it at Valentin, killing him. François barricades himself in his apartment, preventing the police from capturing him, but realizing his life is ruined (1:27) he shoots himself in the heart (off camera) just before police throw tear gas into the apartment.

pathological liar | suicide