prosecutor becky holt opened for the state. >> the defendant had a plan.. his plan was to get away with it. >> with no murder weapon found, the prosecution's case was built on that partial shoe print. they knew now that jason once owned a pair of hush puppies like these that matched the print. they were now missing. they also told jurors about that early morning visit to the gas station and the suspicious activity at the hotel. but the thrust of their case was this: jason young was trying, in the most violent possible way, to get out of a troubled marriage. >> were you aware of tensions in that marriage? >> yes. i was well aware. >> michelle's sister lived near the couple, and for a period was cassidy's nanny. as the youngs' fights intensified, she took on the role of marriage counselor, too. >> what would you say were the main issues? >> michelle's main issues were jason being more responsible, understanding her more, and his main concern was their lack of sex life. >> prosecutors called friends to the stand to paint a picture of a marriage that was unrav