I'm sorry that you, like me, had to deal with a suicide threat. That said, you did make what I consider to be a huge mistake (I've made, and make, them too). In my opinion when there is a suicide threat, whether you think it's a bluff or not, you must call 911 and report the threat, regardless of where he is located (your 911 will usually help you connect with 911 where the person is located).
By not doing that you enabled him and gave him what he wanted, tried to control something you can't control, and completely came off the rails.
I've only made a few good decisions about my wife, but one of the best was calling 911 when she threatened suicide yet again.
What are you going to do when he does it again?
Take what you want and leave the rest.
Cyranoak
P.s. There can be hospital and transportation costs involved which is something to consider only if affects you and or/children IMHO.