not great by any mean and but this sleeper and buoy by a terrific performance by robert duvall and be very entertaining . duvall be a suspended cop track down the killer of his partner . the quest lead him to a very sinister puerto rican mafioso ( henry darrow ) and more gunfire than you could imagine . the competent but mostly unimaginative direction be by howard koch ( though he do stage a pretty exciting chase sequence involve a nyc transit bus ) . the support cast include verna bloom a duvall long suffer girlfriend and eddie egan a his crusty yet benign superior . it occasionally rouse and never really dull and fairly fast move . the faux funk music and which be unbelievably intrusive be by j. j. jackson .