Two miniature documentaries billed as “true crime” stories of murder in Colorado are entirely fake and apparently created by artificial intelligence, law enforcement said. A 25-minute film about a Littleton man murdered by his stepson with whom he’d a sexual relationship reached 2 million views on YouTube, while another, about a Fort Collins man killing his wife, got 200,000. The videos used AI-generated photos of the supposed murderers and victims, invented the names of attorneys and got basic facts about the cities wrong.