The time line - Sunday evening, October 28th.
About 7:00pm - Thomas Morphey, meets DP at park and they go to a coffee shop to talk. At some point DP excuses himself and leaves for a while, leaving his cell phone with the instructions that if it rings, don't answer it. While he's gone the phone rings and the caller ID says Stacy. DP returns and asks TM to accompany him to his house to move a container. The two go to the Peterson home and according to TM move a rectangular container from the upstairs bedroom to DP's Denali.
About 10:00pm - DP takes Thomas Morphey home. Thomas Morphey is frantic and tells his neighbor/friend, Walter Martineck that he thinks he just helped DP dispose of Stacy's body.
About 11:00pm - Cassandra goes to the Peterson home and both cars are gone. She speaks to one of the older boys who tells her that his mom and dad had an argument and dad is out looking for her.
About 11:30pm - Cassandra calls DP on his cell phone and he answers. He's out of breath and she hears cars keys. He says he's at home, but Cassandra knows he isn't because she's parked in view of the Peterson home.
About 2:30am - Cassandra drives past the Peterson home and both cars are in the driveway. Her friend, Bruce, calls DP and DP says Stacy has left him.
About 3:30am - truckers at a truck stop in Bolingbrook say they were approached by DP and another man described as stocky with salt and pepper hair about age 50. The truckers are asked to transport a package to a destination, at which time DP will retrieve the package.
It appears that after DP took Thomas Morphey home, he met with another party, who may have helped him dispose of the container. It also would appear that the container was moved from DP's Denali to another vehicle, and both DP's Denali and Stacy's car were returned to the Peterson home sometime between 11:30pm and 2:30am. DP is still trying to find a place to dispose of the container at 3:30am when he and the other man approach truck drivers at the truck stop.
What happened to the container from 3:30am and beyond? Did DP find a trucker that would agree to take the container, or if DP couldn't find a trucker willing to take the container, he and his accomplice would have had to make a decision on where to hide the container on an immediate basis until a more permanent solution could be found.
Where was DP at 11:30pm when Cassandra called him and he was out of breath and Cassandra heard car keys?