This is the area where authorities were looking for Audrii Cunningham 2:20

(CNN) --

Don Steven McDougal, the man who will be charged with criminal charges by the Polk County Prosecutor's Office following the discovery of the body of 11-year-old Audrii Cunningham, has a long criminal history in Texas, according to court records.

Police say McDougal was the last known person to see Audrii Cunningham before the girl disappeared last week in Livingston, Texas. McDougal, 42, is a friend of Cunningham's father and lives on the family's property, according to authorities.

For his part, the suspect stated that he is “innocent” and that “he has done nothing wrong” in several posts on social media, as shown by his Facebook activity. "I'm not guilty," a Facebook account that appeared to belong to McDougal wrote in a comment beneath a post made on the "True Crime Society" profile the day after Audrii Cunningham was reported missing.

“I was there and they interrogated me. I am not running or hiding,” McDougal wrote before commenting again and saying, “I have done everything I can to help find her. "I haven't done anything wrong."

CNN contacted police about Facebook comments that appeared to belong to McDougal, but authorities did not respond about the social media posts.

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The suspect's background

In 2010, McDougal was convicted of aggravated assault with a deadly weapon and sentenced to four years in prison, Harris County District Court records show. McDougal pleaded guilty to threatening a man with a knife.

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The victim in that case told CNN on Tuesday that McDougal, his former co-worker, attacked him after he kicked him out of her home.

"He came with some other friends he had," Elic Bryan said. "We ended up kicking him out of the house and he came back with a knife."

Bryan said McDougal began stabbing the door before going back inside.

"He came at me with the knife, and I had my shotgun and I hit him in the face with it," Bryan told CNN. "I had no idea he was that kind of person."

Bryan experienced the loss of his seven-year-old daughter, who died of cancer in 2016.

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"There's nothing that can compare to losing a child. It's the most horrible thing in the world," Bryan said.

"If he (McDougal) is responsible for kidnapping this girl, I don't think there is a cell big enough and dark enough for him."

The charging document in Bryan's case indicates that McDougal had been convicted three years earlier of seducing a child in Brazoria County, Texas. Court records show he pleaded not guilty and was sentenced to two years in prison, but was given credit for 527 days. Brazoria County online records do not provide details about the specific allegations in that case.

McDougal was convicted of aggravated assault with a deadly weapon again in 2019, according to court documents in Liberty County, Texas. The prosecution in that case said McDougal struck a man "in the back of the head with a pipe or object unknown to the grand jury."

CNN has not been able to determine whether McDougal already has legal representation.

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