In the clink, the lock up, the big house, the slammer.  .Broadly, a bad day for our heroes,

Book 3 Chapter 21 - Sticks and Stones

Living in secret and stealing to eat is a hard life, but it's all Kuro has ever known. Fear and necessity forged him into the finest young thief in the wizard kingdoms. Nobody can hide forever, though, and a run of poor luck lands Kuro in a place where his quick hands and quiet feet count for nothing: Avalon Academy, school of magic.