Well, I'm glad that particular "crisis" is over.
Next time, as mentioned above, it would be a very good idea to leave it to the professionals.
After receiving a text from him tonight, with his location and “help me”
Should you receive another text from him with a call for help, that's when to call 911 and give them his location.
You can't help him, your Mother can't help him, he needs the kind of help that only other professionals can give. Now whether he chooses to pursue that help afterward, well that's 100 percent up to him.
You didn't Cause it, can't Control it and can't Cure it.