Huck is arrested in this Scandal scene. He is being held under the Patriot Act.
Added:
Olivia must choose sides when she helps the Vice President on Scandal. "Blown Away" is the ninth episode of the show's second season.
Added:

Scandal Season 2 Episode 9 Quotes

I'm new to the field of remote controlled sniper rifles. Is there a trade magazine they send out to enthusiasts, psychopaths, assassins?

Abby

[to Harrison] The person they're looking for, the one they think shot the President? That's me.

Huck