reporter: in the more than 20 years that investigators have struggled to find amy s killer two names keep coming up. i keep coming back to scott manley and dominic kanuika. reporter: one theory is that both men were involved. did amy have something they wanted, money or drugs? what if scott came across dominic at some point and talked dominic into doing this? they re both having this addiction to drugs. they re both needing money. reporter: remember, dominic kanuika places himself at the scene, and investigators have wondered if the plan was for kaunika to break into the house while scott manley drove the getaway car. did dominic get dropped off by scott manley, and then scott was going to circle around and pick him back up? reporter: when bunny and bob came home from church early, the plan may have fallen apart. could manley have abandoned kanuika, leaving him in the lurch? that would fit with the lehton s description of the masked intruder. he seemed nervous
reporter: in the more than 20 years that investigators have struggled to find amy s killer two names keep coming up. i keep coming back to scott manley and dominic kanuika. reporter: one theory is that both men were involved. did amy have something they wanted, money or drugs? what if scott came across dominic at some point and talked dominic into doing this? they re both having this addiction to drugs. they re both needing money. reporter: remember, dominic kanuika places himself at the scene, and investigators have wondered if the plan was for kaunika to break into the house while scott manley drove the getaway car. did dominic get dropped off by scott manley, and then scott was going to circle around and pick him back up? reporter: when bunny and bob came home from church early, the plan may have fallen apart. could manley have abandoned kanuika, leaving him in the lurch? that would fit with the lehton s description of the masked intruder. he seemed nervous
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