Examining a dead body, Dr Isles appears to say, "Subdural hemorrhaging around the trachea and larynx." The dura mater is a layer that surrounds the spinal cord and the brain, inside the skull. A subdural hemorrhage is dangerous because it puts pressure on the brain, potentially causing brain damage or death. The trachea and larynx are surrounded by cartilage but are nowhere near the dura. It's possible Dr Isles meant "subdermal hemorrhaging" (below the skin).
Even though the victim's cell phone clearly has a selfie sent seconds before he was murdered, showing the murderer, this was mentioned by the team. However, there was no investigation around the photo seems to be performed.
When Rizzoli and Isles start their rental car, Dr. Isles says "Turbo." The rental car is an Aston Martin V12 Vantage S Roadster which is naturally-aspired, so it doesn't have a turbo.