Hello and Welcome!
Regarding the OnStar. It has been said it wasn't activated.
If you will refer to post 36 above it will answer your questions about the video. You can watch it at the link. It was not Michelle's Hummer leaving.
Thanks and Happy Thanksgiving!
Well according to the article the camera caught two Hummers & they have spoken to the owner of the other Hummer unless the article is wrong or my interpretation is..
snip)
The video also caught a second Hummer in the area. The lead detective on the case said they have tracked one of the SUV's to a neighbor.