Apparently, many team members who were present at the house lived on campus, in a dormitory, and police tried to go fishing for something incriminating without a warrant, but were rebuffed.
Either that or the Moe, Larry and Curly Durham PD couldn't find the room for which they were looking. Campus housing is very confusing. If you read the search warrants that have been executed so far, there are very specific instructions on the route that must be taken to the address. I'd hate to have to do that on any college campus where the address is always building and room number and there are no streets.