Two Kinds Of Truth by Michael Connelly

Harry Bosch is retired from the Los Angeles Police Department but not from police work.  Unable to retire happily, he is now working part-time at the San Fernando Police Department, lending his expertise to their understaffed department.  While at work one day, he gets a visit from his past.  One of his old partners is now working cold cases.  The LAPD has created a Verdict Integrity division and one of Bosch's enemies is heading it up.  He has chosen to revisit the case of a man Bosch put on Death Row twenty years ago. 

The Integrity Team's evidence looks strong.  The main piece of evidence against the man is a necklace the victim always wore which Harry found hidden in the man's apartment.  The killer insists that Bosch planted the evidence.  Even worse, new forensic testing shows another man's semen on the victim's clothes.  The man has been granted a hearing on whether he should get another trial and the story is a front-page newspaper story.  If the killer prevails, Harry's entire career will be tainted and every case he worked will come into question.

In the meantime, his part-time job has heated up as well.  A pharmacist and his son are gunned down in their shop and it looks like an assassination.  Who would want to kill them?  Harry and his new team soon uncover a plot that makes the usual murder seem friendly and Harry goes undercover to solve the case.  Another ex-partner, Jerry Edgar, is involved in this one as well.

This is the twentieth novel in the Harry Bosch series.  Harry is not a necessarily friendly man but he is truthful and loyal to those he trusts.  He may bend the rules a bit but is determined to find the truth and put those who break the law away.  One of the most interesting things about this novel is the interplay with his ex-partners and the fact that the strong relationships Harry has built over time are what allows him to be successful.  This book is recommended for mystery readers.