Investigators: Father admits to trying to kill unbuckled son...

A Colorado father was placed behind bars on Tuesday after investigators said he admitted to purposefully not buckling his son into his seat and running the vehicle into multiple other cars.

Nathan Weitzel, 29, buckled his own seat belt at 11 a.m. on Aug. 21, but told deputies he purposefully didn't restrain his son because he was trying to kill him, KUSA reports. His son, 2-year-old Isaiah, is currently in a cast and "can't move very well" after Weitzel drove into several cars at 75 miles per hour Tuesday in Arapahoe County, Colorado.

Investigators said Weitzel admitted his plan to them.

"The reason he wanted to kill Isaiah was because being a father was a big responsibility and he did not think he was man enough to raise a child,” investigators said.

"He's in the place that he should be," Isaiah's mom, Nancy Lopez, told KUSA. "He needs to be in jail for a long time."

Weitzel was with Isaiah at the park and “thought of a way to kill” him, and left the child at the park to look for a good place to crash the car, investigators said. He also admitted to authorities that he had been on cocaine that day. A sheriff’s deputy helped Isaiah out of the car following the crash and told investigators that the child was “crying and appeared to be fading in and out of consciousness.”

“I don’t understand why or how he could do something like this, but I’m hoping Isaiah recovers soon; people pray for us and for my son to get better," Lopez said.

Weitzel was arrested and charged with attempted first-degree murder, child abuse, assault, criminal mischief, possession of a control substance, and vehicular assault.

To help with Isaiah's medical expenses, the family started a GoFundMe account, which has raised more than $11,000 so far.