CASPER, Wyo. — Casper police arrested a local man Friday morning on suspicion of choking a woman until she passed out. When she awoke, he punched her in the kidneys and back, breaking a vertebra in her back, police say.

Alec Chastaine, 47, of Casper, remained in Natrona County Detention Center on Monday morning where he awaits a court appearance where a judge will read prosecutors' formal charges. 

Court documents that prosecutors will use to support their charging decision state the woman was — in addition to the broken bone in her back — left with scrapes and bite marks on her face, red marks on her neck and bruising on her arm. She told police that she thinks Chastaine could kill her and has tried to do so previously, according to the documents.

Chastaine told a police detective that the woman had tried to assault him and he grabbed her in self defense, the documents state. He said his military training took over and he put her in a choke hold and bit her. Chastaine told the detective when the woman had passed out, he checked to make sure she was still breathing, according to the documents.

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He told the detective he had choked the woman until she lost consciousness three times in the past five years, the documents state.

The woman told police that after someone called 911 from her cell phone on Thursday night, Chastaine destroyed both her and his cell phones so that she could not call 911, according to the documents. She said that he choked her while he held her against a wall. He then bit her face, the documents state she said.

She woke up at 3 a.m. in the house's living room, where Chastaine told her "I should have finished you off last night," the documents state she told police. Before she had gotten up, Chastaine began punching her. He pummelled her kidneys — which are the location of a prior medical issue — and her back, the documents state.

She crawled to the kitchen, and called 911 from a child's cell phone, according to the documents.

Police found the phrase "he hits me" written on the walls of the house's bathroom and kitchen, the documents state.

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Follow crime reporter Shane Sanderson on Twitter @shanersanderson