A law officer would never be left alone
What happened to the buddy system? In major American cities, cops always patrol in pairs at night.
Here's a deserted police station and the police brass leaves a single law officer to fend for herself. This is unrealistic. It doesn't matter that she's a woman. Maybe it matters that she's a rookie. In the interest of safety there should have been two law officers left on duty in the deserted police station. And the police brass should not have left a rookie on her first day at the deserted police station. If necessary even a security guard should have been hired to keep the policewoman company. Again it doesn't matter that she is a woman. There should have been a fellow police officer for the safety of the buddy system. Then again, it's strange the haunted police station was not discovered as being haunted, unless it was all covered up.