Martin Shkreli's Lawyer Fires Back at Congress

The former pharma CEO was issued a subpoena.

"They demanded his appearance and then ridiculed and condemned him for invoking his constitutional rights that Congress is expected to respect and defend, not ridicule," he said.

Shkreli, who also faces an unrelated securities fraud charge, invoked his Fifth Amendment right at the hearing and did not answer lawmakers' questions -- only responding in a tweet as he left Capitol Hill.

Brafman defended the tweet as the expression of “raw outrage at the forced spectacle he was required to participate in.”

A spokesperson for the House Oversight Committee did not immediately return a request for comment.

Shkreli, who has pleaded not guilty to the securities fraud charges, will next appear in federal court on May 3.