"His conviction was overturned," Watts confirmed. "Due to the murder weapon being 'no longer of evidentiary value'." He took a deep, shuddering breath before he continued.

"The knife was in the process of being catalogued by a constable, when a fight broke out outside of the station. That constable was told to leave his desk to aid in the melee outside, and when he returned- the fingermark had been wiped clean."

He looked up at Steven, meeting his eyes for the first time since he'd begun recounting this tale. "And would you care to take a guess at the name of the man who told that constable to leave his desk?"