Has anyone considered the possibility that SA never actually made those threats - or if he did, they were just a "matter [or manner] of speaking" and never intended as a serious threat?
In the first call, BD starts out by saying she doesn't want SA in the house for fear he'll take something. Police response is along the lines of "there's not much we can do about it" - THEN she "ups the ante" by suggesting her son might be there and SA might be a danger to him. That still doesn't get far with the police.
From the way the officer responds to the second call, I'm fairly certain there were other calls/visits to the station in between - and again, judging from the way the officer responds, it sounds as if BD doesn't get what she wants. So, she says that SA threatened her and her ex. (I would REALLY like to know if the officer saw those text messages she claims BD sent.)
Then - SA calls police reporting she might be suicidal. Maybe BD has been calling him giving him a bunch of drama, too?
Those calls just don't strike me as legit. I'm not so sure BD wasn't "playing" the cops.