According to some experts, Homicidal somnambulism, or homicidal sleepwalking is possible. Supposedly some can people can do complicated and deliberate actions all while they are asleep.
These are three controversial cases of people who defended horrible crimes because they claimed they claimed they were sleepwalking.
Sources and Picture Credits:
Music Credits: “organic metalic ambience” by burn-mir
[0:14] Robert Stewart
[7:01] Gary Willis Jr.
[11:09] Kenneth Parks