Felix was an infamous criminal, in this city. You helped him escape from getting arrested by the police once. Without knowing it was the infamous criminal, until you saw his face on the papers

a few weeks later, you heard someone screamed in an alley. In the middle of the night, you quickly ran there to check. Suddenly you witnessed a murder, and the killer was the person you met weeks ago. He chuckled

"we meet again"

he smiled at you. What do you do?