Kenneth Olson

State Crime Laboratory trace examiner Kenneth Olson testified that he detected lead near defects in two charred cranial fragments, but not in the comparison areas he tested. He described the defects as consistent with high-speed projectiles and said a bullet could have supplied the lead, without identifying a particular bullet or firearm; he also acknowledged that another relatively pure lead source was possible. In Avery's trial, he said he had not examined item FL and could not link the lead traces to it. Olson identified burned cell-phone and camera remains, though his laboratory could not extract information from them. His headboard examination did not establish the presence of rope fibers: he found none in the search described at Avery's trial and, in Dassey's trial, said fibers he found were not consistent with rope, while identifying a thin film on one spindle as polypropylene.