Recluse - Spider Series, #1

You were my brother in the line of duty. My partner. My best friend. You were the man who had it all. Your thoroughness and precision made you a great cop. It's what got you killed. And now I live with the darkening shadows of your memory. You weren't here when I needed you to save me. You weren't here when I needed help solving the most gruesome murder this town had ever seen. But most of all, you weren't here to keep me from falling in love with your wife.