leanna set off to work early.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. and i probably didn't even hear him because he falls asleep very easily when you drive a car. that was it. >> he said he didn't realize what he had done until hours later when he got in his car after work and started driving. >> i caught a glimpse of him in my -- when i looked to my right to change lanes. >> ross said he went flying into the closest parking lot and pulled a lifeless cooper out of his car. a bystander called 911. >> there is a baby on the ground. >> dash cam video from a polic