When the Lights Go Out (2016) online

"When the Lights Go Out" follows a team of paranormal investigators as they go on one last job to a haunted mental institution where children have reportedly gone missing. While searching for evidence of what is haunting the abandoned building, they stumble upon clues that reveal what made the former head doctor snap and go on a killing spree through the halls decades earlier. Unfortunately, the more they uncover, the more they struggle to make it out of the asylum alive because something inside wants that mystery to stay dead and buried.