The House Oversight and Government Reform Committee sent Martin Shkreli a subpoena to appear before Congress next week, Agence France-Presse reports. He will testify at a hearing on prescription drugs and drug pricing.

“A subpoena was issued to Mr. Shkreli,” a committee aide confirmed to AFP. Also, Shkreli tweeted about it.

“House busy whining to healthcare reporters about me appearing for their chit chat next week. Haven’t decided yet. Should I?” he sneered in another tweet, addressed to Representative Elijah Cummings, the top Democrat on the oversight committee.

“I have been trying for the better part of a year to get information from Martin Shkreli about his outrageous price increases, and he has obstructed our investigation at every turn,” Cummings said in a statement.

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