WEST VALLEY CITY — Police have more evidence that an abusive father investigators say took his three children, whom he has no custodial rights over, may be headed to Mexico.

Investigators searching the home of Israel Hernandez, 30, said they found a note written in Spanish. In the note, believed to be written by Hernandez, he said he felt the system was not treating him fairly and that he was going back to Mexico, said West Valley Police Capt. Tom McLachlan. Police did not say Thursday if the note was addressed to anyone in particular.

Meanwhile, an Amber Alert remained in effect Thursday for Xiomara Hernandez-Torres, 3; Pablo Hernandez, 4; and Alicia Hernandez, 6.

Israel Hernandez had custody of the children taken away from him in 2006 by the state because of a continuing pattern of physical abuse. The children were given to another relative, but he was allowed visitation. Over the years, the relative became lax on allowing him to take the children for a few hours unsupervised. Hernandez took the children Sunday during one of those visits and never returned, McLachlan said.

Police say the case has been extremely frustrating because very few leads have panned out. Detectives are receiving a lot of calls on possible sightings, McLachlan said, but as of Thursday morning, none of them had turned up anything.

Hernandez is believed to be on the run with his girlfriend, 32-year-old Marta Torres.

Xiomara Hernandez-Torres is 25 pounds and was last seen wearing a rose-colored shirt, black pants and white shoes.

Alicia Hernandez is 3 feet 6 inches tall and weighs 40 pounds. She has black hair and brown eyes and was last seen wearing a red and pink shirt and white shorts.

Pablo Hernandez is 3 feet tall and weighs 30 pounds, with brown hair and brown eyes. He was last seen wearing a blue shirt with white stripes, blue jeans and white shoes.

The group is believed to be traveling in a black Cadillac Escalade or a maroon Chevrolet Corsica. Investigators believe Hernandez, a native of Mexico City, may be headed for the Mexican border.

Anyone with information on Hernandez or the missing children can call 911 or police at 840-4000.

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