Former Alaska Gov. Sarah Palin's oldest son was arrested Saturday night after he showed up at his parents' house and started hitting his father in the head, after threatening to "beat his ass" in a fight over a truck, according to an affidavit from police in Wasilla, Alaska that was published by the Los Angeles Times.

According to the affidavit, Sarah Palin called the police, which led to the arrest of her son, Track Palin. Sarah Palin told police her son was “freaking out and was on some type of medication.”

Track Palin, 28, reportedly came to his parents' house after he and his father, Todd Palin, started fighting over a truck that Track Palin wanted to get. Todd Palin told his son not to come because he believed Track had been drinking and was taking pain medication. Despite his father’s protest, Track Palin said he was going to “come anyway to beat his ass,” the father told police, according to the affidavit.

Todd Palin said he retrieved a pistol to protect his family.

Track Palin told police that when he arrived at his parents' house, he saw his father with a gun in his hand. The 28-year-old attempted to open the front door, but was unsuccessful. When he looked through a window next to their front door, his father was pointing the gun at him.

Track Palin said he told Todd Palin several times to shoot him.

When Todd Palin tapped the barrel of the pistol on the window, Track Palin punched through the glass, police officer Adam LaPointe said in his affidavit.

Track Palin then entered the house and was able to “put [Todd Palin] on the ground.” The 28-year-old then started hitting his father in the head.

Todd Palin was able to escape and he left the house. LaPointe said when police arrived, they saw Todd Palin leaving in one vehicle and Sarah Palin leaving in another. Sarah Palin, he said in his affidavit, was “visibly upset,” and Todd Palin had blood running down his face.

Track Palin remained in the house alone, and police heard him yelling and tried to make contact with him.

He came to the front door and stood on the porch, and police tried again to communicate with him. But their efforts failed, according to LaPointe, because he was yelling and calling the police officers “peasants.”

Track Palin was also telling the officers to put their guns on the ground before coming up to the house, the report said.

According to the affidavit, Track Palin went back into the house and then emerged from an upstairs window. He then walked onto the garage roof and “moved around in a strange manner and assumed a prone position.”

Track Palin then went back inside the house.

After 10 to 15 minutes, police were able to begin communicating with him, and he walked outside to speak with them. According to LaPointe, it was then that police handcuffed the 28-year-old and put him in the back of the police car.

The eldest Palin son told law enforcement he had a few beers earlier in the day. He was arrested on charges of felony burglary, as well as assault in the fourth degree and criminal mischief in the fourth degree, both misdemeanors.

The 28-year-old has been arrested for domestic violence before, though the charge was dismissed. He pleaded guilty to a weapons charge and was serving two years of probation at the time of the incident Saturday.

Sarah Palin, the 2008 Republican vice presidential nominee, said after the 2016 arrest her son suffered from post-traumatic stress disorder following a one-year deployment to Iraq.