A Dish Served Cold by G.S. Marriott

Young girls are being murdered in downtown Los Angeles. Detective John Cooper and his relatively new partner, Kelly McArthur are assigned to the case. Problem, his new boss, Commander Randall Sinclair wants it solved quickly to further his own personal career goals, but will stop at nothing to destroy the career of his long time nemesis Cooper in the process. Future victims don't seem to be relevant to Sinclair, leaving the detective to fight more than one enemy.