. >> 70-year-old convicted murderer tom echo zigler has been on death row, for 40 years -- for two death sentences and the gruesome christmas eve or murders of his wife, her parents and a customer at the furniture store in winter garden. he told channel 920 years ago >> i think he is the most logical one. i think there is somebody behind him. >> over the years, there have been many questions. many people going to that for him. now the justice project at northwestern university led by professor klein, says they are in search of the truth. today, we asked him, why now? >> the jury recommended that he get life. in that case, the judge overruled the recommendation and gave him the death penalty. so his case is very relevant given the date and the reconsideration of the death penalty in florida. >> he says there are nagging questions. for one, he has heard he would've had to have shot himself with his nondominant hand -- judging by the angle of the bullet wound and possibly pulled the trigger with his thumb. he wants to track down the eyewitness who reportedly changed his story. dna testing d

. >> 70-year-old convicted murderer tom echo zigler has been on death row, for 40 years -- for two death sentences and the gruesome christmas eve or murders of his wife, her parents and a customer at the furniture store in winter garden. he told channel 920 years ago