Principle: Whoever does not arrest the killer and report the matter to the concerned authorities commits an offence.
Facts: 'A', a woman, sees 'B', another woman, killing a third woman 'C'. 'A' neither attempted to arrest 'B' nor informed the concerned authorities.
'B' has not committed an offence.
'A' has not committed an offence.
'B' has committed an offence.
'A' has committed an offence.
'A' has committed an offense.
According to the guiding principle, it was the duty of A to inform the concerned authorities about the meader of 'C' by B. Hence 'A' has committed an offence is the correct.