Not Long For This World Aaron Gunner Series, Book 2.

A lawyer hires Gunner to help her prove that her gangland client is not a killer Darrel Lovejoy doesn't owe South Central anything. By all accounts, he is lucky to escape this desperate corner of Los Angeles, to go to college and graduate into a well-paid advertising job. But something compels him to return. He dives into social work, attempting to mediate between the gangs which have brought hell to the streets he grew up on, and he makes slow b...