Not too late to call the police. I wouldn't take their claim that no one used a card to enter her room all night. They may be covering for someone - a former or current employee for example. As previously stated, it is bad PR to admit they have a problem like that. I'd request the hotel GM (not assistant manager) show you the print out, and tell you what they are doing about it. If it is not a satisfactory answer, call the police to make a report. At least it becomes a part of the record if it should happen to someone else, perhaps with a less acceptable outcome.