US Representative Chris Collins (R-NY) resigned Monday afternoon after being accused of insider trading in a 2018 criminal complaint.

Collins is accused of using his position as a board member of Innate Immunotherapeutics to provide insider information to members of his family. The complaint states that, “Christopher Collins, a member of Innate’s board of directors, tipped his son Cameron Collins with material, nonpublic information about Innate’s negative drug trial results in violation of Innate’s policies and in breach of the fiduciary duty that he owed to the company.”

Collins plans to plead guilty to the offense and sent a letter of resignation Monday to US Speaker of the House Nancy Pelosi.