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The US Department of Justice announced on Monday that a man from Florida has admitted to threatening to assassinate a Supreme Court justice.

Neal Brij Sidhwaney, 43, from Fernandina Beach, entered a guilty plea on Friday to one count of making an interstate threat to injure. In a voicemail left at the Supreme Court in July, Sidhwaney used explicit language and threatened to kill a justice, identifying himself by name in the message.

Court records reveal that Sidhwaney named Chief Justice John Roberts as the target of his threat during a court-ordered psychological evaluation. The message he left for the US Marshals to convey to Roberts was a direct threat: “I will fucking kill you,” as per the court documents. Sidhwaney was apprehended in August and has been in custody since his arrest.

The psychologist who evaluated Sidhwaney determined he was fit to stand trial despite noting his long-standing “fixed delusional beliefs” and diagnosing him with delusional disorder with psychosis. The court filings also mentioned that Sidhwaney is under medication, taking an anti-psychotic drug. He now faces a potential sentence of up to five years in prison, although a sentencing date has not been determined.