In a case like this it is always the spouse or the boy friend who is the prime suspect. The fact they did not find a body or have enough evidence to convict him of murder makes this cold case very hard to put a end to it. Just because they found a sweater with stab like cuts in it does not mean that he stabbed her. Maybe he stabbed the sweater. That being said I have to believe that yes he had a big part in the disappearance and probable death of Lynette. Now it is the burden of proving that and being able to convict him that makes it very hard.