Ye should not mind that this enemy of yours has been killed deceitfully. When the number of one's enemics becomes great, then destruction should be brought about by wily ways.
न च वो हृदि कर्तव्यं यदयं घातितो रिपुः। मिथ्यावध्यास्तथोपायैर्बहवः शत्रवोऽधिकाः॥