of pain in little cottonwood, california, during the surreal minutes and hours and days after karen duenas >> the best way i can explain my mom is pure of heart is the best way to say it. >> the whole big family, karen's family, as well as mark's, parents, brothers, sisters, gathered to support each other and mourn and struggle with the question that hung in the air, who did this? but the word on the street was there was no question at all. >> we immediately heard rumors outlandish rumors going, i don't know where you're getting this. >> the boys heard them, too, rumors the detectives knew the killer was mark, to which the family said -- >> that's ridiculous. i know there was no way possible he could have done it. >> my parents were best friends from as long as i could remember. >> but if that was true when why would detectives be so suspicious of a man married to his high school sweetheart for almost 33 years, a man without so much as a traffic ticket on his record, let alone a violent act? well, it's true that when wives are murdered, husbands are frequently implicated, and mark did disc