Irvine Welsh 
Rattlesnakes (Storycuts) [EPUB ebook] 

Madeline, Eugene and Scott are three young, beautiful Americans, engaged in a love triangle and enjoying their free and drug-fuelled youth. When they have a car crash in the desert they are forced to wait for assistance. But events spin out of control when they are found instead by a young Mexican who, charged up on the memory of the violent death of his mother and the numerous indignities he has suffered at the hands of his American employers, is ready to make the world pay. Part of the Storycuts series, this short story was previously published in the collection If You Liked School, You’ll Love Work.