case like this is to get a timeline of the events. reporter: ross told detectives the morning had begun like many others. leanna set off to work early. ross set out to take cooper to day care and decided to stop for breakfast at chick-fil-a near his office. and me and him do that at chick-fil-a in vinings approximately two or three times a month together. reporter: 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 s my routine. and just today was just like, careless. i got in my car, and instead of going from here to here, i went straight to work. reporter: ross told police he d simply forgotten to take cooper to day care. i went to work. as if he wasn t even in the back. and i probably didn t even hear him because he falls asleep really easily when you drive the car. and that was it.
ross, just kind of run me through your morning today. reporter: 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. reporter: ross told detectives the morning had begun like many others. leanna set off to work early. ross set out to take cooper to day care and decided to stop for breakfast at chick-fil-a near his office. and me and him do that at chick-fil-a in vinings approximately two or three times a month together. reporter: 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 s my routine. and just today was just like, careless. i got in my car, and instead of going from here to here, i went straight to work. reporter: ross told police he d simply forgotten to take cooper to day care. i went to work. as if he wasn t even in the back. and i probably didn t even hear
reporter: 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. reporter: ross told detectives the morning had begun like many others. leanna set off to work early. ross set out to take cooper to day care and decided to stop for breakfast at chick-fil-a near his office. and me and him do that at chick-fil-a in vinings approximately two or three times a month together. reporter: 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 s my routine. and just today was just like, careless. i got in my car, and instead of going from here to here, i went straight to work. reporter: ross told police he d simply forgotten to take cooper to day care. i went to work. as if he wasn t even in the back. and i probably didn t even hear him because he falls asleep really easily when you drive the
through your morning today. reporter: 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. reporter: ross told detectives the morning had begun like many others. leanna set off to work early. ross set out to take cooper to daycare and decided to stop for breakfast at chick-fil-a near his office. and me and him do that at chick-fil-a in vinings approximately two or three times a month together. reporter: 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 s my routine. and just today was just like, careless. i got in my car, and instead of going from here to here, i went straight to work. reporter: ross told police he d simply forgotten to take cooper to day care. i went to work. as if he wasn t even in the back. and i probably didn t even hear him because he falls asleep