Conversation so far:
What is Francis Bok's escape story?
Francis Bok waited three years, until 1996, before he tried to escape again.
When did Francis Bok escape slavery under Giemma?
Bok finally escaped from Giemma when he was 17 years old by walking through the forest to the nearby market town of Mutari.
How did Francis Bok escape slavery under Giemma?
Bok went to the local police department to seek help, and asked the police to help him find his people. Instead of helping him, the police made him their slave for two months.

Question: What happened?
Self-contained rewrite: What happened after Francis Bok escaped the police who made him their slave for two months?