This person threatened to kill my entire family and himself if I messed with him

Received a call from Mega millions. Stated I won millions of dollars. Did I receive cashiers check yet? And asked me to call back a frank Peterson at this number. 18762901983   This is sand number original call came from. I knew if was a scam. Googled ph number and comes up Jamaican mobile. Beware!!!

My elderly mother has been getting multiple phone calls, supposedly something about insurance.  She kept just hanging up (as I told her to do with suspicious calls,) but then it occurred to me to have her get a phone number if the guy called back.   She thinks it's always the same guy calling.