Visible crew/equipment: A green screen is visible in Agent Weine's glasses when talking to Agent Schrek after they let Alex go during Ms. Lewton's death sequence. (00:58:05)
Visible crew/equipment: When the train breaks Carter's car there is a camera man inside it.
Visible crew/equipment: During the FBI's original investigation, a green screen can be seen in the officers glasses. However, nothing green is in the room. (00:20:50)
Visible crew/equipment: In Tod's death scene, as the camera enters the bathroom, it points to his reflection in the mirror and then continues to move, turning right to avoid being caught in the reflection. However, for around 2 or 3 frames, you can see the matte box of the camera. (00:31:40)
Visible crew/equipment: After Alex walks into Ms. Lewton's home before he discovers her blood on the floor, you can see a crewmembers shadow moving on the light brown TV table. (Note the shadow doesn't match Alex's movements).
Answer: It is "And When I Die" performed by Joe 90, based on the Blood Sweat and Tears song. It's available in iTunes.