Passage: In 2073, Sunday sees C.A.B. agents detain a child as onlookers protest. The siblings watch the recorded incident and debate turning themselves in. The following day, Monday prepares her disguise, nervous about giving a presentation. At a checkpoint, Monday runs into Adrian Knowles, a C.A.B. agent who flirts with her. At the bank, Monday's co-worker, Jerry, a competitor for the promotion, hints at blackmailing her.

Question: who was detained in 2073 by the CAB agents
a child