How does Bullet describe how Santiaga ended up in prison to Winter?

Bullet describes to Winter how Santiaga ended up in prison by telling her about a Brooklyn gang called Young Heads. They robbed one of Santiaga's drug spots, and word went out that he was vulnerable. Then one powerful police official, whom Santiaga had in his pocket, retired. One by one, the little pieces of Santiaga's empire began to crumble. His soldiers began to give information to federal officials in exchange for amnesty, and dirty cops moved over to the Young Heads. Santiaga was arrested based upon information from his own men.