Question

What were the clues that led to the detection that Charlton was
the real culprit?​

Answer 1

Answer:

The culprit was very cleaver to run away and prove an innocent a culprit but Manning caught him when he started suspecting him. He became certain about "Charlton" being the culprit when he found remains of dark mustache on the upper lips of Charlton which were the same as that he found on the crime scene.