"I was really friendly, and I knew what was going on wasn't what it was in its entirety," the veteran of Bachelor Pad and The Bachelorette, 27, said of his Jan. 15 arrest and subsequent highly photogenic mug shot.
"I wasn't drunk. I smiled. I wasn't charged with anything. I wasn't convicted of anything. There were no charges filed. I just smiled because [jail personnel] told me to."
Kahl was arrested on a drunk-and-disorderly-conduct charge after an alleged brawl in Fresno, Calif., following a night at a bar with friends. His rep suggested that his assailants were merely seeking to get their names into the limelight.
"I was having a good time with cops," Kahl told PEOPLE Saturday at a Bachelor reunion at 1 OAK Las Vegas. "They were joking around."
As for the details of the arrest, he is far less forthcoming.
"I can't talk about the incident or the allegations," he said. "The truth will be out there. I know that in my heart I did nothing wrong."