L. A. Requiem

Description for L.A. Requiem by Robert Crais:

The day starts like any other in L.A. The sun burns hot as the Santa Ana winds blow ash from mountain fires to coat the glittering city. But for private investigator Joe Pike, the city will never be the same again. His ex-lover, Karen Garcia, is dead, brutally murdered with a gunshot to the head.

Now Karen's father calls on Pike and his partner, Elvis Cole, to keep an eye on the LAPD as they search for his daughter's killer--because in the City of Angels, everyone has something to hide. But what starts as routine turns into a deadly game of cat-and-mouse. For a dark web of conspiracy threatens to destroy Pike and Cole's twelve-year friendship--if not their lives.

This is #8 in Elvis Cole series.