A Texas fugitive sought on multiple charges after allegedly cutting off his ankle monitor and fleeing that state is jailed in Pottawatomie County after local authorities nabbed him here and found numerous firearms, as well as a gas mask, a bulletproof vest and a book about serial killers, the sheriff said.

A Texas fugitive sought on multiple charges after allegedly cutting off his ankle monitor and fleeing that state is jailed in Pottawatomie County after local authorities nabbed him here and found numerous firearms, as well as a gas mask, a bulletproof vest and a book about serial killers, the sheriff said.

Pottawatomie County Sheriff Mike Booth said Eric Masters Castillo, 38, was arrested in the case and is now jailed in the Pottawatomie County Public Safety Center.

Booth's office, working with U.S. Marshals, became involved in the case to track down the fugitive when it was believed he could be in Pottawatomie County, he said.

The sheriff said Castillo was wanted on four counts of sexual assault of a child, one count of failure to comply with the sex offender registration and one count of aggravated assault with a deadly weapon.

Booth said authorities determined he had a girlfriend who has children. U.S. Marshals, working with the Pottawatomie County Sheriff's Warrant Team, went to a residence in the northeastern part of the county, in the area of Kings Road and Westech Road.

There, Castillo was nabbed with a loaded pistol in his waistband, Booth said. Authorities also found other firearms, including two shotguns, three rifles, two other pistols, along with ammunition, a gas mask and a helmet, as well as a bulletproof vest. In addition, they found a book about notorious serial killers, Booth said.

Jail records show Castillo has refused to sign extradition papers, so a Governor's warrant from Texas will be needed from that state for extradition. Castillo is also expected to face possible charges here of possession of a firearm after former felony conviction, Booth said.

While here, Booth said Castillo was using the alias name of Tyler Durden.

“He was trying to fit in in Pottawatomie County,” Booth said.