>> ross, just kind of run me through your morning today. >> prosecutor chuck boring was brought into the investigation early on. >> i think the main goal in a case like this is to get a timeline of the events. >> ross told detectives the morning had begun like many others. leanna set off to work early. ross set out for breakfast at chick-fil-a near his office. >> we do that approximately two to three times a month together. >> after they ate, ross said he strapped cooper into his car seat. >> i gave him a kiss. he gave me a kiss. what i do every time, it is my routine, and just today was just -- careless. i got in my car, and instead of going from here to here, i went straight to work. >> ross told police he'd simply forgotten to take cooper to daycare. >> i went to work as if he wasn't even in the back.