in the care of (someone)
Being supervised or attended to by someone. If I go back to work, I'll have to leave the younger kids in the care of my oldest daughter. I've left the Jefferson accounts in the care of Dave while I'm out on leave.
*in the care of someone
and *in the charge of someone; *in someone's care; *under someone's carein the keeping of someone. (*Typically: be ~; leave someone or something ~; place someone or something [into] ~.) I left the baby in the care of my mother. I placed the house into the care of my friend.