in my opinion CW did not think he had a lot of time to clean crime scene when he got back from working a shift at work all day and getting calls about where his wife was. Her schedule was high demand, if anything time worked against him. There is zero evidence he killed the girls and waited hours alone with them waiting for her to come home immediately kill her wait another three hours ,not cleaning or getting rid of evidence not staging a scene she left but just sitting waiting and then leave at 515 am. IMO this crime happened at about 4 am the time he usually got up for work noted by many sm posts. It to me happened from her fear of losing everything. She found out about AP. She reacted in the worst way ever by taking the one thing she could do to hurt him. She was losing her home,her income,her security, her image . He was moving on by separation. . He had zero to gain by her murder. No life insurance, no alimony he owed, and Colorado divorce laws distribute fairly.