[[WMG: ''Maria'' shot ''the player character'' ("[[VideoGame/GrandTheftAutoSanAndreas Claude]]") at the end of the game.]]
She was talking to distract him. He was shaking his head, facing away from her and she killed him. She stopped talking to pull the trigger. The whole game was an EvilPlan by Maria to get rid of all of her enemies.
[[WMG: ("[[VideoGame/GrandTheftAutoSanAndreas Claude]]") shot ''Maria'' at the end of the game.]]
Similar to above, but Claude, after all he went through the game, shoots Maria to put an end to her. He shoots and kills her and moves on with his life with most of the gangs wanting him dead.
[[WMG: Claude shot himself at the end of the game]]
Yet again, similar to the above [=WMGs=], Claude felt guilty about all of the murder he had committed at the end of the game and decided that he'd only let one more be added to his body count.
* Or because he couldn't stand being stuck with Maria and her endless droning but knew there was no other way to get rid of her, bar shooting her, but he couldn't bring himself to shoot a woman, a general principle he holds which he only made a single exception for in Catalina's case because...well, come on, that b*tch seriously asked for it!
* This is actually impossible, as the player is free to do as he/she pleases after the "ending" cutscene.
[[WMG: Claude shot Maria... but not just because she was talking too much...]]
You know the last time we saw Maria? Y'know, before she was "kidnapped" by Catalina? She was torturing Miguel, the Colombian mob boss, with Asuka, the Yakuza mob boss, to get dirt on Catalina's SPANK operation. After this appearance, Maria kills both Miguel and Asuka, and "kidnaps" Maria. Seems like convenient timing? Nope, Maria was TheMole all along, and was helping Catalina to wipe out her remaining criminal competition in Liberty City. Either that, or [[KlingonPromotion she took Salvatore Leone's position in Catalina's drug trade]] [[YouAreInCommandNow after Claude capped him.]] Either way, the "kidnapping" was all staged to lure Claude into a trap. Maria kept up the ruse after Claude blew Catalina out of the sky to save temporarily save her hide, but Claude, even being ambiguously DumbMuscle for any mob boss that asked him to do a favor, was smart enough to put two and two together, and made sure Maria was RewardedAsATraitorDeserves.
[[WMG: Claude doesn't speak because he's french and doesn't speak english.]]
Claude isn't mute. When he's injured he grunts and groans in pain. He is capable of producing sound, but he never speaks. At the same time, he sports a distinctly French name and his origins are never explored. It could be that he's a frenchman who just doesn't speak English (but understands it) and thus doesn't talk to other chracters because he doesn't know how to, since they all speak English.

[[WMG: The gunshot at the end of the game was a surviving Colombian gang member:]]
Claude spotted a Colombian member who survived the incident and finished him off Maria stopped talking because the gunshot startled her :]]