R. Barri Flowers 
Honolulu Cold Homicide [EPUB ebook] 

His new case is linked to a cold case that’s all too personal When his latest case carries echoes of his sister’s cold case murder, Detective Sergeant Lance Warner is visited by another ghost from the past. Caroline Yashima isn’t only the specialist assigned to work alongside him, she’s also the ex he regrets walking away from. He’s not sure if he can expect a second chance. But when Caroline becomes a target, he knows he can’t live without her.