Consider this. One version of the story by GC has him telling MP that he has phoned 911. MP says "you shouldn't have done that, she's gonna be in lot of trouble". GC says to MP "so are you if you don't stay right here". A word to the wise is sufficient. To MP, this has got to come as a somewhat threatening statement. He knows the situation is rapidly deteriorating. He has no idea how long it will take LE to get there. His safest assumption would be that it is imminent. Is he going to continue his good samaritan pursuit of his "fare", or is he going to punch-out and go home?
Of course, he is bailing out as fast as he can. But what then? Does he hang out outside of OB to watch what happens next? The question here is, what did he expect? Because if he expected the police would catch her and bring her in, he would may have hung around to see it happen and give some information to ACCCCCCC, the bf/pimp. Notice, I got the C right this time :floorlaugh:
However, if he expected something more sinister or tragic, he would have hightailed off not only out of Dodge but a little further and then have laid low. No phone calls to SG's phone, no contact to AC except for a little heads up and for sure no demonstratively showing up with AC at OB.
So, I can only guess, this is not even IMO, this is IMG, in my guess, and nobody will get any links to it, but ... MP's behavior shows here exactly the break, you pointed out with your initial question. He didn't call SG's phone, because he expected this story would make waves. But after a few days, he pops up in OB with the pimpbf. That is demonstrative, open, cleaning the image. It is basically based on a changed expectation on MP's side.
MP is in this business for years. If someone knows about drug addicted prostitutes and ODs, it would be him. So what he expected that night COULD have been the police finding SG'd body, oded. This would be, in his mind supported by the fact, that he couldn't find her and she was, at the last time, he saw her, in full paranoia mode. So he may assumed, she hid in a hole and died from drugs.
But then, no body was found, nothing in the papers, no Internet news about a dead girl in OB. Police obviously hadn't found a body. Now, like most people, MP would have expected, the police actually looked. He had to assume, if she was alive and at OB, the police would have found her. Of course, we know, the assumption police is actually looking for a girl running at night through a gated community while showing irrational behavior, is already a big assumption, but MP, like many others would have expected that. So ... what would be his conclusion and by that, his next expectation? She is alive, hiding, maybe from AC, maybe from him, maybe from the police, who knows with someone with SG's problems. Maybe she went on a drug binge? And in that scenario, it was a question of time, till police would pick her up and she would tell stories about Michael Pak and maybe her boyfriend too. So the need to look good becomes bigger than the need to keep the distance. And while they walk through OB, the find CPH, an elderly guy who heard the neighborhood chitchat and is anyway already shivering for a possibility to inject himself into it.