Trust Your Instincts

It was 5 years ago. I thought I already knew everything. But here I am, told that I only knew quite a small portion from that accident, or so they say it was. And he's here. Willing to help me solve a case of my very own mother. Willing to do everything just so justice will be served. Should I trust him? Will my instincts be right about my decisions? I will find it out, At any cost.