A former U.S. Capitol Police officer was found guilty of obstruction of justice Friday for deleting communication he had with a participant in the Jan. 6, 2021 Capitol insurrection.

Michael A. Riley, the 51-year-old former officer, was not at the Capitol during the pro-Trump riot, but was instead responding with a K-9 unit to reports of an explosive device outside the Capitol complex on Jan. 6. It was his actions the day after the insurrection led to his arrest.

Riley messaged Jacob Hiles, a Facebook friend who posted about breaching the Capitol building, offering advice: “im a capitol police officer who agrees with your political stance,” he wrote, according to prosecutors. “Take down the part about being in the building they are currently investigating and everyone who was in the building is going to charged. Just looking out!”

Riley also told Hiles he shouldn’t “sweat it” and that legal action wasn’t likely against everyone who stormed the Capitol.

“Just wanted to give you a heads up,” one of his messages read. “Im glad you got of there unscathed We had over 50 officers hurt, some pretty bad.”

The two exchanged hundreds of messages, according to the Justice Department, but Riley deleted those messages when he learned that Hiles had turned himself in to the FBI and that law enforcement had access to his phone. Riley followed up with one final message, allegedly pretending he thought Hiles had been pushed into the Capitol and that he was upset to learn Hiles was actually in the building “smoking weed and acting like a moron.”

“I feel like a moron for believing you,” Riley wrote, according to the charging documents. He testified in his own defense and told the jury that he wasn’t trying to hide evidence by deleting the messages with Hiles, but was instead embarrassed and didn’t want investigators to think they were close friends.

After deliberating for four days, the jury found Riley guilty on one count but couldn’t agree on a second obstruction count, per CNN. The judge ruled the second charge a mistrial.

A federal judge will determine Riley’s sentence at a later date, yet to be announced. The obstruction of justice charge carries a maximum of 20 years, according to a release from the Department of Justice.

Riley has so far been the only USCP officer charged in relation to the Jan. 6 insurrection, though other law enforcement officers have faced legal action. In the months after the deadly attack, investigators recommended disciplinary action against six Capitol Police officers for their conduct during the breach.