CARRIZO SPRINGS, Texas – John Michael Alvarado, 18, is charged with murder after he alleged a Carrizo Springs High School migrant counselor tried to grab his penis, according to an arrest affidavit.
Carlos Pena, 50, was found dead Tuesday night at his home in Asherton, which is near Carrizo Springs, the Dimmit County Sheriff's Office said.
According to the affidavit, Alvardo admitted to killing Pena after an alleged sexual assault.
Alvarado punched Pena's face and head multiple times, the affidavit said.
Pena then grabbed Alvarado's right leg, and that's when Alvardo got a pocketknife with a serrated edge and stabbed Pena in the neck, torso and abdomen, the affidavit said.
Alvarado, who is cooperating with authorities, called 911 and was arrested.
"He told the investigators, the dispatcher, that he would be waiting ... out in front of the home, and that’s where he was found, right where he said he was going to be," Dimmit County Sheriff Marion Boyd said.
It's still unclear why Alvarado was at Pena's home.