01:53 - Source: KSNV
Report: War Machine attempts suicide

Story highlights

Jonathan Koppenhaver leaves behind a suicide note

His ex-girlfriend says he assaulted her in August

"I'm so cursed," he says after the alleged assault

CNN  — 

After a weeklong manhunt, authorities have arrested mixed martial arts fighter Jonathan Koppenhaver in Southern California for allegedly beating his ex-girlfriend in Las Vegas.

Koppenhaver, 32, is known as War Machine on the MMA circuit. He allegedly beat adult film actress Christy Mack and a male friend on August 8 – then went on the run.

Police captured him a week later in his hometown of Simi Valley, California. He’s been held at the Clark County Detention Center since then.

A corrections officer conducting checks at the detention center found him unresponsive in his cell on Tuesday, according to CNN affiliate KSNV.

Suicide note

He was found seated on the floor with a torn piece of linen around his neck, which was attached to his bunk, Officer Jose Hernandez told the affiliate. Koppenhaver, who was unresponsive and struggling to breathe, had left behind a suicide note.

Hernandez cut the linen and called medical personnel, who later cleared the fighter and put him on suicide watch at a medical isolation unit. Details of his suicide note were not released.

Police captured Koppenhaver, who goes by War Machine, at a motel in Simi Valley on Friday afternoon. He’s originally from the suburb near Los Angeles.

‘I’m so cursed’

Koppenhaver has said that he’d gone to surprise his ex-girlfriend with a ring when he found her with another man.

“I only wish that man hadn’t been there and that Christy & I would be happily engaged,” he posted on Twitter in August. “I don’t know y I’m so cursed. One day truth will come out.”

He is facing various charges, including domestic battery and attempted murder.

CNN’s Greg Morrison contributed to this report