Authorities recovered the body of Collin Walker, 4, from 12 feet of water in a private lake in Blackhawk, just southeast of Terre Haute, following an extensive search late Tuesday. Police said they rescued his brother, Monte Walker, 2, from the water during a struggle with Katron Walker, 32, the boys' father.

Officials said Katron Walker took Collin and Monte Tuesday morning from the home of the boys' grandfather, prompting the issuance of an Amber Alert late Tuesday afternoon. The incident happened on the day the boys' mother filed for a protective order against Katron Walker, her husband, police said.

Police said Collin Walker had been stabbed in the chest and had a laceration on his neck. A preliminary autopsy Wednesday showed that he died of the chest wound, Vigo County Coroner Roland Kohr said.

Monte Walker was listed in good condition at Riley Hospital for Children in Indianapolis Wednesday morning. Police initially said he was suffering from stab wounds and a laceration on his neck, but the hospital declined to confirm the injury details.

Katron Walker was under guard at Union Hospital in Terre Haute, also suffering from self-inflicted knife wounds, police said. Officials said tests showed he had methamphetamine and marijuana in his system after his capture.

Police Found Three After Receiving Tip

Police said Walker had taken the boys to the lake, where witnesses told police they frequently went fishing and for other recreation. Police went to the lake after receiving a tip from the daughter and grandson of Leo Dean, who had seen the Amber Alert and saw a man matching the description walking from the area.

"He said, 'That looks like the same van they were describing,' so he checked the license number and the license number checked," Dean said.

When police arrived, Katron Walker ran out of an abandoned trailer on the lake property as he held both children and jumped into the water at about 9 p.m., Terre Haute Assistant Police Chief Bill Bergherm said.

Officers went into the water, where they were able to rescue Monte. Officials said Katron Walker was uncooperative as they grabbed Monte and tried to search for Collin.

Police said Collin's body was later found by a conservation officer.

Investigators found a knife they believe was used in the stabbings and some children's clothing in the trailer.

Woman Had Filed For Restraining Order Against Husband

The boys' mother, Teresa Walker, told 6News that her husband took the children after she called him to tell him she wanted a divorce. Walker said her husband had begun abusing drugs and was becoming violent.

She said she left her husband on Sunday and filed for a restraining order against him Tuesday at 11 a.m. The order was granted at noon.

"He had told his wife yesterday morning at her place of employment ... and made an intimidating statement about, 'I'm going to be a star,'" Bergherm said.

Teresa Walker said she dropped the boys off at the home of her father, Michael Dwyer, on Tuesday morning.

Katron L. Walker

Dwyer said Katron Walker took the boys from his back yard at knifepoint at about 10 a.m. and sped off with them in a van. Police said the van had been carjacked from a friend.

"My sister went out and she was trying to get them back," Dwyer said. "He threw her down and she came right back at him and he kicked her twice in the chest."

"When they were taken, they were terrified," Teresa Walker said Tuesday night. "They knew it was not normal and they knew it was not good."

Family members were thankful for help from police, but wondered why it took hours after the abduction before an Amber Alert was issued. The alert was issued shortly before 5:30 p.m. -- about seven hours after the boys were taken.

Katron Walker was charged with methamphetamine possession in 2002.

Protective-Order Petition Makes Three Allegations Of Abuse

In the petition for the restraining order, Teresa Walker alleged that her husband was involved in three incidents of abuse since January.

In January, she wrote, Katron Walker pushed her backward over some toys, bruising her leg.

On April 30, she wrote, she ordered her husband from her home. He picked up Collin and told her he wasn't leaving without him, according to the petition.

When Teresa Walker threatened to call police, Katron Walker responded that police would have a big mess to clean up when they arrived, according to the petition.

Previous Stories:

• June 14, 2006: Police: Boys, Father 'Accounted For' After Amber Alert
• June 14, 2006: Amber Alert Issued For Two Boys