3:05 PM PT -- Henrie just released the statement he promised earlier on social media, and took full responsibility for the "situation." He apologized for any trouble he caused and said, "More than anything I am humiliated and embarrassed that this even happened." He also made sure to give another shout-out to TSA and LAPD.
1:56 PM PT -- We got David leaving jail, and he tells us the gun was his and totally legal. He's got nothing but respect for the officers who arrested him, and says he'll clear everything up later today.
Henrie was immediately detained and taken to a nearby station.
Brown's had his fair share of run-ins with the law -- with several arrests over the years -- he was most recently caught on surveillance in a burglary.
Henrie recently revealed he and his wife, Maria Cahill, are expecting a daughter. In announcing the pregnancy, Henrie said, "That reminds me. Where's my shotgun. I don't have a shotgun. Someone get me a shotgun!"
We reached out to his reps ... so far, no word back. Henrie is still in custody.
Originally published -- 11:06 AM PT