Ghostly Target by E.M. Leya

When someone starts killing police officers in the city, Detective Angus Young prioritizes finding out who’s attacking those he works with. He’s determined to take down the killer before any more officers are targeted.
Having the skill to speak to the ghosts of the dead is usually helpful to a medical examiner, but not when the ghosts can’t identify who killed them. Keeping Angus safe is Lance’s first priority as he does everything he can to try and help fit the clues together and bring peace to those who have died.
Working together, Angus and Lance put everything else on hold as they follow the leads to find a cop killer. With the help of friends both living and dead, the puzzle slowly starts to fit together, but once they have all the pieces, can they find the killer before another officer is shot?