What was the point of Nino killing the guard and framing another?
That scene seemed senseless to me. Why did Nino go through the trouble of sneaking up to the other gang member, stealing his knife and stabbing another member to frame the first?
The fact that Nino just released the colonel and Manco to make it look like they escaped is all that Indio needed to tell his gang to hunt down the two bounty killers.
If Indio made it look like the escapees killed the guard, that would have been understandable, but he didn't! He set up one of his own men for no reason...