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COLEMAN: Well, we know that Chris Coleman says that he left for the gym at about 5:45 that morning. By the time police got there and discovered the bodies it was 7:00 a.m. So you`ve got a very narrow window of time. Now, Dr. Michael Baden, renowned forensic scientist has reportedly taken a look at the autopsy reports and he pinpoints that time of death between 3:00 a.m. and 5:00 a.m.
GRACE: Back to renowned chief medical examiner out of Broward County, Dr. Joshua Perper. How did Baden do it, Dr. Perper.
PERPER: My understanding is there were no special tests done in this particular case such as the level of a chemical called potassium in the eye (ph) which helps with the exact determination of the time of death. I must say they think that Dr. Baden went on a leg here and this kind of determination within two hours is really highly questionable. However, all of the other circumstantial evidence certainly points to the father and the fact that he called the police the short time, but I think that the determination of the so-called postmortem clock is very wide and unreliable and to restrict it to two hours, I would say is highly questionable.
http://transcripts.cnn.com/TRANSCRIPTS/0905/21/ng.01.html