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>> he had about 3 $1/2 million to gain and what he would gain if he had gotten away with it. >> reporter: the evidence was substantial and eric had a weight at home and the prosecutor argued eric used to weight to kill pegye and sink her body. what about the blood? a luminol test conducted on the boat indicated there might have been a lot of blood in the boat but then cleaned up matching tina's testimony about blood everywhere. then there was tina herself. >> despite her past and her criminal record and her drug use, she rang true to you? >> yes. absolutely. >> who would the jury believe and w...

In a luminol test. >> but in the basement, investigators found a pile of debris swept into a corner. they gathered everything and sent it to the forensic lab. under a microscope, scientists found pieces of drywall with the same blue and pink paint layers as the drywall found underneath wesley's body. >> what are the odds that you and i both went to home depot and bought the same paints all the time and painted our walls the same colors year after year after year? >> but were both samples the same paint? analysts put both samples under a scanning electron microscope. >> you're using the microsc...

Soil's eastern rich and iron in itself will give false positives in a luminol test. >> but in the basement, investigators found a pile of debris swept into a corner. they gathered everything and sent it to the forensic lab. under a microscope, scientists found pieces of drywall with the same blue and pink paint layers as the drywall found underneath wesley's body. >> what are the odds that both you and i went to home depot and bought the same paints all the time and painted our walls the same colors year after year after year? >> but were both samples the same paint? analysts put both samples ...

Harrisburg, pennsylvania. when we began looking at these properties, we were able to determine that three of those properties were vacant at the time of the murder. >> the property that needed the most work was on south 13th street in downtown harrisburg. records showed it had been built in the 1930s, around the same time builders used animal hair plaster like the kind found with wesley person's body. >> we're looking for slugs, bullet holes in the walls. we were unsuccessful. >> investigators sprayed luminol in the basement of lawrence morrell's construction property on south 13th street and ...

Iron-rich. and iron in itself will give false positives during a luminol test. >> but in the basement, investigators found a pile of debris swept into a corner. they gathered everything and sent it to the forensic lab. >> under a microscope, scientists found pieces of drywall with the same blue and pink paint layers as the drywall found underneath wesley's body. >> what are the odds you that and i both went to home depot and bought the same paints all the time and painted our walls the same colors year after year after year? >> but were both samples the same paint? analysts put both samples un...