Spenser: Pale Kings and Princes (1994)

When one of Susan's former patients, a news reporter, turns up dead on the outskirts of Wheaton, the cocaine capitol of Massachusetts, she and Spenser head out to Wheaton to find out why he was killed, with Hawk tagging along, and end up getting involved with Felipe Esteva, the head of the cocaine smuggling ring who has the entire town in his pocket.