orlando mesa loved the evening ritual. he and his 18-month old son, noah. orlando doted on the boy. >> he was a hands-on dad. >> reporter: and noah's mom, cindy, was there to record it all. >> my husband was an outdoor person. so, you know, he was always doin' things with noah. >> reporter: and so, on a spring evening in the gathering dusk, orlando walked behind noah, who rolled along on his toy car. a security camera watched them toddle down the sidewalk. they disappeared around a corner. >> that was the worst day of my life. >> reporter: what happened? well, that's still being debated, in a way. a chain of events, certainly. of which a father-son evening stroll may have been the first. but certainly not the last. but, a moment first to fill you in. cindy, or janepsy, the name she was born with in cuba, came to miami as a teenager. she was bright, and ambitious. she learned english pretty much from scratch, became a hair dresser, experimented with her own, quite frequently, as you will see. it was back in 2006. cindy carballo had been invited to a super bow