That was never mentioned in the article posted. But it could have been stolen from him & ended up there.
Cops get suspicious of those who volunteer to become involved in cases. That suspicion becomes heightened when they make discoveries, especially if the discovery was made under a bunch of leaves.
Tragic that the bar served him so much that he got blotto, and then set hi loose in that condition on his own.. At that age, friends are not thinking about what is capable of happening in the real world.
He was on a fraternity trip, so he was probably "pre-gaming" before he ever got to a bar. No, this lands squarely on the shoulders of his frat "brothers," who said he was walking back to their hotel after getting kicked out of the bar.
Not having someone walk him back is inexcusable. It was still fairly early, so they could have walked him back, got him to his room, and still been able to go back and keep partying.