I was looking over a past exam paper today and came across this longer question. I'm unsure of which values to use, and where to go once I find these values.
A murder victim has been shot through the head with a revolver. A suspect is found standing over the victim at 10:15PM holding the revolver. At 10:30PM, the coroner records a body temperature of 26°C and it was also recorded that the room temperature was 21°C. An hour later a second reading of the body temperature yielded 24°C. The suspect was seen in public from 6PM to 9PM. Given that the normal body temperature of a living person is 37°C, use Newton’s law of cooling to determine whether or not the suspect has an alibi.