This is a Riddle

After spending a Sunday out at Chick-fil-A, you find that you child has gone missing.

There are three suspects; your maid, butler and cook, each one saying they were doing sometime else at the time.

Your maid explained they were dusting in the back room, the butler stated he was vaccuming the back hallway, and the cook said he had been making a snack for your child.

Based on alibies, who comitted the crime?