I found the link for the timeline and the source for DC being at the residence at the time the police arrived. As stated before, the keys, phone, purse as the articles left behind seemed to vary with different reports. Most of the time, her keys were the contention of whether there or not.
Here's link for the timeline and about DC....
(
Timelines prepared with the assistance of JoVonna Owings, Debbie Caldwell, Kiirsi Hellewell, and Jennifer Graves, friends and family of Susan Powell, and news reports.)
The author's other sources are listed below the article, but one is no longer on line.
http://www.examiner.com/headlines-i...ine-of-days-surrounding-susan-s-disappearance
ETA: I just reread the timeline. To me, it generates tons of questions....many details were left out. It states that DC did go to the house twice, once before the police were called and once again after the police were there, but doesn't say she was there when the police arrived.
If she had a day care center, how is that allowing her to travel to Susan's house....wouldn't she be taking care of kids? Curious too if she continued to call Susan's employer until she confirmed she was not at work? This timeline also states purse and keys....no cell phone. Just so many details left out that could be important.