Suffolk County police said officers conducting surveillance saw Tyreek Langs, 23, carrying the baby in his arms Thursday in Central Islip when he approached another person and allegedly sold heroin, WCBS-AM, New York, reported Friday.
"The child was content, the child is being held by the father and he's approaching the buyer to complete the narcotics transaction with the child in his arms," Suffolk County police Lt. James Rooney said. "To him, it looked like the usual course of business, the way the officers observed him."
Langs had a quantity of heroin on him when he was arrested, police said.
The baby was released into the custody of her great-grandmother. Child protective services were notified of the incident, police said.