Patient threatened to k*ll me

I work on an inpatient unit, a patient I was treating believed himself to be in the CIA, secret service, FBI, etc. When I attempted to reality test him and push back on his delusions he became irate and made threats that “they would take me out”. He was transferred to another providers care, and then discharged on Friday. Yesterday I got a phone call from another hospital stating that the patient had been admitted and was making threats that he would kill me. Has anyone had an experience like this? I am wondering what legal action I should take?