ANCHORAGE, Alaska (AP) — The oldest son of former Alaska Gov. Sarah Palin was arrested in a domestic violence case in which his girlfriend was afraid he would shoot himself with an AR-15 assault rifle, according to court documents filed Tuesday. 
 
 FILE- This Sept. 3, 2008 file photo shows Track Palin, son of Alaska Gov. Sarah Palin, during the Republican National Convention in St. Paul, Minn. Track Palin was arrested in a domestic violence case... (Associated Press) 
 
 Track Palin, 26, is charged with assault, interfering with the report of a domestic violence crime and possessing a weapon while intoxicated in connection with the incident Monday night at the Wasilla home of his parents, where he lives, according to an affidavit by police. 
 
 The girlfriend told authorities she was punched in the face by Palin, who is the oldest child of Sarah Palin, the 2008 Republican vice presidential nominee and conservative leader. 
 
 The charges were filed Tuesday, the same day Sarah Palin endorsed Republican presidential front-runner Donald Trump before voting begins with the Iowa caucuses. 
 
 There is no telephone listing for the girlfriend. The court documents say the woman, Track Palin's girlfriend of one year, had bruising and swelling around her left eye, and she said her right knee hurt after Palin kicked her there. 
 
 Palin family attorney John Tiemessen declined to comment on the matter other than to say in an email that respect for the family's privacy is appreciated "as Track receives the help that he and many of our returning veterans need." Palin's arraignment was held Tuesday, but Tiemessen was not sure if he entered a plea yet. 
 
 Track Palin spent a year deployed in Iraq with the Army. When his mother was the GOP vice-presidential candidate in 2008, she spoke at her son's deployment ceremony in Fairbanks, one of the few trips back to Alaska while on the campaign trail that fall. 
 
 Track Palin enlisted in the Army on the sixth anniversary of the Sept. 11, 2001, terrorist attacks. 
 
 According to the three-page affidavit, both Palin and his girlfriend called 911 that night. Police Officer Andrew Kappler wrote that he arrived at the Wasilla home and found Track Palin walking outside and talking on a phone. The officer said Palin had an injury to his right eye and surrounding area, smelled strongly of alcohol and acted with escalating hostility, prompting Kappler to put him in handcuffs. 
 
 Police say a breath sample provided by Palin showed he had a blood alcohol level of 0.189. 
 
 The affidavit says other officers found the girlfriend hiding under a bed inside the home and crying. 
 
 The argument continued at the home, according to the affidavit, which says Palin struck the woman with his fist on the left side of her head near her eye. She curled up in the fetal position because she didn't know what else he would do, the woman told police. She said he then kicked her in the knee and threw her phone across the driveway, according to the court document. The woman said she went inside after getting her phone. 
 
 Inside, Palin held the rifle, with the barrel just away from his face pointed to the side, the affidavit states. The affidavit adds that the woman told police Palin was yelling "Do you think I won't do it?" 
 
 The girlfriend "was concerned that he would shoot himself and ran outside and around the house," the affidavit says. "She didn't see where Palin went, so she went inside and up the stairs, where she hid under a bed." 
 
 It's not the first encounter with the law for Palin or other members of his family. In September 2014, he and other Palins were involved in a brawl that broke out at a party in Anchorage. No arrests were made in the melee, and no one wanted to press charges. But according to a police report, Palin had blood around his mouth and his hands. He was belligerent until his mother told him to talk to a police officer. 
 
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 Follow Rachel D'Oro at https://twitter.com/rdoro ||||| Sarah Palin's oldest son has been charged with hitting his alleged girlfriend. 
 
 
 
 Track Palin was arraigned in Alaska on Tuesday, after being charged with fourth degree domestic assault, interfering with a domestic violence report, and misconduct involving weapons. 
 
 The Wasilla police department confirmed to ET that officers responded to an incident on Monday night at 10:04 p.m. The police tell ET that a woman had called reporting a male had punched her in the face, and that a gun was involved. 
 
 MORE: Sarah Palin Gives 'Coveted' Endorsement to Donald Trump 
 
 
 
 "An investigation revealed Track Palin had committed a domestic violence assault on a female, interfered with her ability to report a crime of domestic violence, and possessed a firearm while intoxicated," the police said in a statement. 
 
 The 26-year-old was arrested and held without bail until the arraignment, police reveal. 
 
 WATCH: Bristol Palin Responds to Conspiracy Theories About Daughter Sailor's Birth Date 
 
 
 
 An affidavit obtained by ET claims that Palin -- who had a blood alcohol level of .189 -- identified the alleged victim, Jordan Lowe, as his girlfriend, and stated that the altercation stemmed from Lowe maintaining correspondence with an ex-boyfriend. 
 
 At this time, Palin has not plead guilty to any charges. ET has reached out to the Palin family's rep and attorney. 
 
 Meanwhile, amid her son's mounting legal troubles, Sarah Palin endorsed Donald Trump for president on Tuesday. 
 
 WATCH: Bristol Palin's Brother Trig Cradles Baby Sailor: 'He Officially Loves Her' ||||| TULSA — Former Alaska governor Sarah Palin on Wednesday addressed her son's recent arrest — which she called “the elephant in the room” — while stumping here for Republican presidential candidate Donald Trump, and accused President Obama of neglecting veterans and tied that to her son’s recent domestic violence charges. 
 
 “When my own son is going through what he goes through coming back, I can certainly relate to the families who…feel these ramifications of PTSD,” she told the rowdy crowd of around 8,000 people. “And it makes me realize more than ever it is now or never for the sake of America’s finest that we have a commander-in-chief who will respect them.” 
 
 Sarah Palin's oldest son and a former member of the military, Track Palin, was arrested and charged with assault, interfering with a domestic violence report and misconduct involving weapons in Wasilla, Alaska. The news broke as Palin announced her high-profile endorsement of Trump in Iowa. 
 
 Police responded Monday to a phone call at Sarah Palin's Wasilla home, where Track Palin lives, after his girlfriend called 911 to report that Track Palin had punched her in the face. He was also, according to his girlfriend, carrying an AR-15 rifle which she feared he would use to harm himself; Track Palin allegedly began yelling, “Do you think I won’t do it?” 
 
 [Sarah Palin’s son Track arrested at her home, girlfriend ‘concerned’ he ‘would shoot himself’] 
 
 Alluding to her son’s legal troubles, Palin said she was speaking “personally” when she described soldiers “who come home from the battlefield bringing new battles with them…coming back different than when they left for the war zone.” 
 
 “I guess it’s kind of the elephant in the room, because my own family going through what we’re going through today with my son, a combat vet…like so many others, they come back a bit different, they come back hardened,” Palin said in Tulsa. “They come back wondering if there is that respect for what their fellow soldiers and airmen and every other member of the military so sacrificially have given to the country." 
 
 [Sarah Palin endorses Donald Trump’s presidential bid] 
 
 Palin said the United States should elect a president who will respect the military. 
 
 “It’s a shame that our military personnel even have to wonder if they have to question if they're respected anymore. It starts from the top," said Palin. "The question, though, it comes from our own president where they have to look at him and wonder, ‘Do you know what we go through? Do you know what we’re trying to do to secure America and to secure the freedoms that have been bequeathed us?’” 
 
 [Sarah Palin is a no-show at Trump campaign event in Iowa] 
 
 Palin did not appear as scheduled at a campaign stop with Trump Wednesday morning in Iowa before they both flew to Tulsa. 
 
 Justin Wm. Moyer contributed to this report from Washington.
– While Sarah Palin was endorsing Donald Trump in Iowa, her oldest child was facing domestic violence charges in Alaska. According to court documents obtained by Gawker, Track Palin, 26, was arrested at his parents' home on Monday night after an ugly incident in which he allegedly punched and kicked his girlfriend before threatening to shoot himself. In an affidavit, a police officer says he went to a Wasilla residence after separate 911 calls were received from the woman and from Palin, who told dispatchers the woman was drunk. The officer says that when he saw Palin outside, "his eyes were bloodshot and I detected a strong odor of alcohol on his breath and person. Upon contacting Palin, he was uncooperative, belligerent, and evasive with my initial line of questions." The officer says he handcuffed Palin, and other officers found the woman hiding under a bed in the residence. According to the affidavit, she said that after an altercation in which Palin hit her in the face and threw her phone, she went inside and "found Palin holding a gun with the barrel pointed near his face and saying, 'Do you think I won't do it?'" KTUU reports that Palin was released on bail Tuesday after pleading not guilty to fourth-degree assault, interfering with a domestic violence report, and misconduct involving a weapon. A Palin family attorney tells the AP that the family wants privacy while Track, who spent a year in Iraq while serving in the Army, "receives the help that he and many of our returning veterans need." (In 2014, Track and other Palins were involved in a huge brawl.)