A Florida man has pleaded guilty in connection with threatening to kill a Supreme Court justice.

The guilty plea from 43-year-old Neal Brij Sidhwaney of Fernandina Beach stemmed from a call he made to a Supreme Court justice in July, the Justice Department said in a news release Monday.

He faces up to five years in federal prison on one count of transmitting an interstate threat. A sentencing date has not yet been set.

Prosecutors said that Sidhwaney identified himself by name in an expletive-infused voicemail and repeatedly threatened to kill the Supreme Court justice, who is not named in court documents.

Sidhwaney warned that if the justice alerted deputy U.S. Marshals, he would talk to them and “come kill you anyway,” according to court documents, which did not indicate what prompted Sidhwaney to make the threat.