EL PASO, Texas (KFOX14/CBS4) — An El Paso Independent School District custodian was arrested after he allegedly stabbed another man, leaving him with serious injuries; the suspect said the man fell on the knife during the struggle.

On Monday, the assistant head custodian of Captain Gabriel Navarrete Middle School, Paul Joseph Cuellar, was booked into the El Paso County Downtown Jail and charged with aggravated assault with a deadly weapon and assault causing bodily injury to a family member. Cuellar’s girlfriend of 11 years told police he hit her during an argument over infidelity and later stabbed a man she called to help her, according to an arrest report.

Investigators said the incident happened Sunday at about 12:30 a.m. at a home in the 400 block of Gladys Avenue, near Riverside High School.

After the stabbing, investigators said they received two 911 calls — one from Cuellar and another from people helping the victim. During his call, Cuellar told dispatchers he had been in an argument with his girlfriend and that he had cut someone with a knife, the report said.

The other call came from a nearby gas station, where the caller reported a man had been stabbed in the back at the 400 block of Gladys Avenue and said Cuellar was at that address with a knife, according to the report.

Cuellar told investigators the couple had been driving home from a “get-together” when he confronted his girlfriend because he suspected she had been cheating on him, the report said. He told investigators he demanded to see her phone and pulled on her purse to get it, but denied hitting her.

Cuellar told investigators that as he was pulling on the purse, two men showed up and began assaulting him. He said he pulled out a knife and the victim “fell on the knife” while they wrestled on the ground, adding that he did not recall exactly what led to the stabbing, according to the report.

During the interview, investigators said Cuellar admitted he texted his mother afterward, writing,

mom I’m in trouble I think. O got jumped by two dudes. Because [girlfriend’s name]’s lies and not being straight. I think I stabbed one of them o had no choices at the time. I I’m so sorry I called the police also to tell them that.

Cuellar also admitted to investigators that he uses methamphetamine and said he makes mistakes and is untruthful, the report said.

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Cuellar’s girlfriend told investigators that Cuellar assaulted her while they argued in the driveway. She said she called the victim, who arrived in an SUV with another man, and that a quick fight followed, ending when the victim was stabbed. She told investigators that she, the victim and the other man got into the SUV and left.

Investigators said they spoke with the victim at the hospital, but he did not say much because he was in “extreme pain” while receiving medical care and could barely answer questions. Investigators said he confirmed Cuellar was the person who stabbed him.

Authorities reviewed surveillance video from a home near the stabbing and from the gas station where the victim stopped to check his wounds and call police, investigators said. In the home video, investigators said they saw two people yelling and struggling in a driveway before a third person approached and tried to separate them. In the gas station video, investigators said they saw Cuellar’s girlfriend, the victim and a third man get out of the SUV, with the third man on the phone calling 911 while the victim removed his shirt and Cuellar’s girlfriend applied pressure to the stab wounds.

Medical personnel listed the victim’s condition as critical but stable, noting multiple stab wounds to the back and a ruptured lung, the report said.

Cuellar is listed as the assistant head custodian at Captain Gabriel Navarrete Middle School and during his bond hearing Cuellar confirmed he was an employee with EPISD.

KFOX14/CBS4 reached out to the school district for comment.

EPISD wrote back,

El Paso ISD is aware of the incident. Because this is a personal matter, the district has no further comment at this time.

As of Tuesday afternoon, Cuellar remains in jail under a combined bond of $252,500.

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