At 9 am on October 19, 2019 a body was found in a room. The room is kept at a constant temperature of 72 degrees Fahrenheit. The medical examiner was called and he arrived in 8 minutes. The first thing he did was to take the temperature of the body. It measured 83 degrees Fahrenheit. Thirty minutes later the temperature of the body was taken again and it was now 78 degrees Fahrenheit. Help the police by telling them when the person was murdered.