Martin Shkreli blasted members of Congress right after refusing to answer their questions

Martin Shkreli, known widely as the "bad boy of pharma," slammed members of Congress on Twitter after his Thursday hearing in front of the House oversight committee.

"Hard to accept that these imbeciles represent the people in our government," Shkreli tweeted.

Shkreli, who giggled throughout the hearing, invoked the Fifth Amendment.

After the hearing, Shkreli's attorney Ben Brafman said his client was nervous and didn't mean any disrespect.

Shkreli, the former CEO of Turing Pharmaceuticals, became infamous when, as CEO, he raised the price of a drug used to treat parasitic infections to $750 a pill from $13.50.

In December, Shkreli was arrested on charges of securities fraud relating to a hedge fund he previously ran.

Here's the tweet: