Following from [CH.3:0002.2]:
The critical time frame starts at 9:00am and ends at 2:20pm when the body is discovered on the bathroom floor. But is it possible to narrow it down further? Yes, it is. Elvis was determined to have died between roughly 9:00am and 11:30am, so we can place the latest time of death at 11:30am. The earliest time of death relies on several external factors, originating from a single point, which I will discuss here shortly.
Continuing:
The 2h30m block of time (9:00am-11:30am) can be further reduced to this block of time:
1 hour and ~45 minutes (9:30am-11:15am)
[In this case, the absolute tightest time frame is 1 hour and 30 minutes, but because the exact time of Elvis’s death is not known, and must be estimated, I am allowing for an additional 15 minutes, which will make sense soon.]
ElvisDecoded 