NILES, Mich. (WWJ/AP) – A 44-year-old man faces a hearing on charges that he stabbed three fellow Amtrak train passengers and a conductor in southwestern Michigan.

Michael Williams of Saginaw is to appear Monday in court on attempted murder charges.

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Police used a Taser to subdue Williams Friday night as the train was stopped at a depot in Niles, about 10 miles north of South Bend, Indiana. He’s being held in the Berrien County Jail on a $1 million bond.

The four victims were in stable condition Sunday. Niles Police Chief Jim Millin has said Williams didn’t have a relationship with any of the victims.

Millin said detectives spoke with Williams over the weekend, but the chief declined to discuss a motive behind the attack.

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Williams’ 89-year-old grandmother says he needs psychological help.

Ethel Williams told WWJ during a phone interview that her grandson Michael Williams was in the military for about 10 years and he was always scared when he got out.  She says he should have gone to the VA (Veterans Administration) when he got out.

She says the 44-year-old Saginaw man once told her “it seemed like everywhere he goes people was following him,” according to the Associated Press.

The train was headed to Port Huron from Chicago.

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