The teenager accused in a deadly Michigan school shooting, is switching his plea to guilty. Prosecutors say Ethan Crumbley will now accept the 24 charges against him.

Crumbley is accused of killing four students in 2021 at Oxford High School.

HLN Trial Correspondent Jean Casarez shows you some of the evidence against Crumbley, including some of the alleged shooter's writing on a piece of school paper that includes the phrases: "The thoughts won't stop" and "My life is useless."

His parents are pleading not guilty to involuntary manslaughter charges for allegedly providing him with a weapon. Their trial has been postponed.

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