In Hyde Park, Cincinnati, police were called to the house of a Mr

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In Hyde Park, Cincinnati, police were called to the house of a Mr. Bush. He was an elderly man, whose body was found at about 10:00 am by his daughter Ellen Marx. She was visiting from Pittsburgh. She stated that she arrived at about 9:00 am at the airport, drove to her father's house and found him dead in the bathroom.

Can you narrow down the time of Mr. Bush's death even more?

In addition to Livor mortis and Rigor Mortis you measure the temperature of the corpse, which is 27.3O Celsius and the temperature in the house, which is 18oC. Given that, on average, a human body loses 10% of its heat in one hour, you can narrow down the time of death even further than before.

1. Approximately when did he die according to his temperature?

2. In case his death is ruled suspicious, can the daughter be excluded as a murder suspect?

3. In case his death occurred naturally, e.g. heart attack, could the daughter have saved him, if she had taken a flight three hours earlier? 

You can use the graphs from the video/presentation Time of death, or the equation that is derived and explained in the video Algor Mortis, to draw your conclusions. Explain your thought process.