Now the question, who's hand performing the peace on the lower right of third panel? Enty?
Seeing as she is English, that is not a peace sign. It is the hand signal to cordially request that the person you show it to goes forth and multiplies. The way to tell the difference is if the palm is facing inward or outward.
Judging by the facial expressions of Wales in panel 3 and Lusty in panel 4, they know full well who actually committed the crime...they just chose to pin it on Ark anyway.