"the man had drugs in his system"
This does not surprise me.
"Police also said that the man had drugs in his system . . . "
That will be the defense his court-appointed lawyer will present. "It wasn't his fault . . . it was the drugs."
He wanted to call to say "I'm sorry".
Maybe he wasn't serious. People do say things like "I'm gonna' strangle this kid if she doesn't shut up." without really meaning it. That he asked uniformed officers in a squad car for the phone must count for something.
Drugs are bad, M'kay.