NORRISTOWN (CBS) — Authorities announced the arrest of  63-year-old Hsiu-Chin Lin Monday. She’s accused of shooting and killing her ex-husband, 67-year-old Chien-Kuo Lin in North Wales.

Chien-Kuo Lin called police to ask if an officer could stand by while he got items from his ex-wife’s home on South 6th Street in North Wales.

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According to the criminal complaint, the officer left the home after Lin was done getting things from the house.

About a half-hour later, police responded to a reported domestic disturbance at a home on the 200 block of South 6th Street just after 4 p.m. on Sunday. According to police, the arriving officers found Chien-Kuo in the garage with an apparent gunshot wound to the chest. He was pronounced dead at the scene.

Hsiu-Chin Lin mugshot (credit: Office of the Montgomery County District Attorney)

Hsiu-Chin Lin mugshot (credit: Office of the Montgomery County District Attorney)

Police say they found Hsiu-Chin sitting at the kitchen table with a .38 caliber revolver in front of her when she was taken into custody.

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“The facts show that the defendant was test firing the gun in the past week and then fired not once, but four times, fatally shooting her ex-husband once in the chest,” said Montgomery County District Attorney, Kevin Steele.

In the criminal complaint, the couple’s adult son tells police his mother asked him if he wanted her to kill his father, he said no, and she asked if he would blame her if he did. The complaint also says their daughter tells police her mother told her repeatedly on the phone that she was going to kill her father.

Hsiu-Chin was charged with first and third degree murder among other related charges.

She was arraigned on Monday and sent to Montgomery County Correctional Facility without bail.

A preliminary hearing is set for June 1.

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KYW’s Jim Melwert contributed to this story.