The doctor allegedly switched on the air conditioner before sleeping on Saturday night, and both the children were found dead the next morning at the unit when their families went to see them.
Ronald Davis, 37, was charged with a felony count of strangulation and misdemeanor counts of unlawful restraint, false imprisonment, simple assault, official oppression and recklessly endangering another person.
Kostas Fekkas, 34, a Manhattan charter school teacher, hid the explicit content on "HideU," an app that allows a user to hide files on a cellphone and is disguised as a functioning calculator.