Context is that a person in Texas was charged with threatening to, “slaughter,” FBI agents in response to the ongoing Hunter Biden probe. Details start at the end of page 2 under the Statement of Facts section here:
CW for slurs and the like, as one can imagine: https://storage.courtlistener.com/recap/gov.uscourts.txnd.391024/gov.uscourts.txnd.391024.1.0.pdf

These phone calls and text messages were sent from the person’s personal phone directly to an FBI agent.