during this surreal minutes and hours and days after karen duenas was murdered. >> the best way i can explain my mom is, she was pure of heart, is the best way to say. >> the whole big family, karen's family as well as marks. parents, brothers, sisters, gather to support each other and more on. and struggle with the question that hugged in the air -- who did this? word on the street was there was no question at all. >> we immediately heard rumors, outlandish rumors. i don't know where you're getting this? >> the boys heard them. to rumors the detective knew who the killer was, mark. to which the family said -- >> it's ridiculous. i know there's no way possible he could've done it. >> my parents were best friends from as long as i could remember. >> but if that was true, then why would detectives be so suspicious of the 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 discover the body. but there w