Returning to the scene of the crime

Later that night, McCrave felt drawn to return to the scene of his crime to see the subsequent spectacle. But he was recognised and identified to Samuel. Samuel sought out a policeman who arrested the surprised onlooker.
McCrave protested his innocence saying he had witnesses who would prove he wasn’t the murderer. Questioned further, he pointed the finger at two of his gang, Campbell and Mullen.

Mullen had fled the scene and returned to his and his brother’s lodgings. He’d woken up his brother Thomas and said they needed to immediately stow away on a ship to America. They were later discovered and arrested aboard a ship on the river.
To catch Campbell, the police followed his sister. She boarded a train and was trailed to Bolton. Campbell was found to be hiding with relatives there.