police say a lethal dose killed 4-month-old adam segall. >> when we found out that it was in his system, i were in complete shock. >> reporter: police say the baby died in march at carol cardillo's unlicensed home day care after getting an overdose of benadryl. >> we were completely betrayed. we couldn't believe that someone we trusted with the care of our son would do something like that. >> reporter: segall the latest infant to die after being given the drug. in ohio, this mom was charged with involuntary manslaughter after her 3-month-old died in march from a suspected overdose. and just this week, a columbus babysitter pleaded guilty to killing 8-month-old haddix mulkey after giving him benadryl to sleep. >> it should never, ever be used as a sleep aid. this is not a sleep aid. it is not indicated as a sleep aid. >> reporter: the fda does not recommend giving benadryl to children younger than 2 because of the potentially life-threatening risks. even for those older than 2, medical professionals say it needs to be appropriately dosed based on the child's size. >> parents think, well,

segal as chief financial officer will be effective in late august and will report to jack dorsey. he will soon resume the role of cfo from anthony noto since adamain left the company. for more reaction to the story, we are joined by dick costolo, former ceo of twitter. for more reaction -- he's now the ceo of chorus, a new company aiming to disrupt fitness. what timing to have you out today. >> literally five minutes before i got out of the cab. totally unplanned. emily: so is he a good choice? >> i am sure he is a high-quality person, in the parlance of the day. i was just riffing on the news story. that was funny to me when i thought of it. [laughter] as i said many times, i have a lot of confidence in the team over there. i'm sure he's a great addition to the team. emily: we know twitter had a strong quarter with growth, but they reported their first quarterly loss. do you expect any change in strategy with the new cfo? >> i couldn't say. but those guys are pretty focused and have been clear about what they are working on. i would expect that to continue as long as they are promoting it. emily: what would you think the new mandate of a cfo w