While interviewing the staff, the marshals learn that Dr. Sheehan, Rachel's primary psychiatrist, is on vacation. Throughout the film Teddy requests to see the patient's background files but these requests are persistently refused. This arouses Teddy's suspicion that something secretive is going on. Throughout the film, Teddy displays constant dreams and delusions about his wife who had died in a fire two years ago. In these dreams, Teddy's wife informs him that Rachel is still on the island as well as Andrew Laeddis, the man who started the fire which had killed Teddy's wife.
In one scene, Teddy explains to his partner Chuck the reason why he took this particular case. When teddy was transferred to investigate Shutter Island, his intention was to find Andrew Laeddis, Teddy explains that Laeddis had been sent to prison after burning down his apartment and then burning down a school, however he was diagnosed with schizophrenia and sent to Shutter Island after several months in prison.