Welcome gw12s. We're not allowed to post names of people not already named by police, media etc. but with that being said, you can give us hints of where to find the info.
Okay, I searched and couldn't find anything from PPD or the media showing him missing. One of CM's FB friends had reposted a post from this guy's mom asking if anyone had seen him, he hadn't been heard from in Plano since 8/31. It turns out he was arrested in Grayson County (down 75 toward Oklahoma) for a drug related issue on 8/31, there's a blotter report about it. His mom posted he was home and "I don't have a lot of details about where he was." On 9/2 around 8 pm. She's also posted about PPD not helping her find her son and she hopes they're helping CM's family more. This guy graduated from AHS in 2007, and his brother is on CM's FB, and one of the pictures his mom posted of her son had an insta username which CM follows. He doesn't have a FB that I could find though.
Not sure if this is relevant at all, just seemed a little odd to me.