Things Take a Wrong Turn
Morris and the Anglin brothers successfully slipped out of their cells, but Allen West couldn’t get out of his. He needed to tell the others that the hole he made was ready, but it looks like a miscalculation was made of the size of the hole. Frank Lee Morris was working from the utility corridor while West was working from the inside. As much as they tried to get him through, the hole just wasn’t big enough, and West was essentially stuck. By 9:30 pm, they both decided that West would need to be left behind.

Source: FBI
Deciding to leave West behind couldn’t have been an easy decision after many months of working together, but the group wasn’t left with many options. Time was of the essence at that point. West clearly didn’t want to stay behind, but he took one for the team and stayed behind, which made the escape more feasible for the three due to less weight on the raft.
The remaining escapees were ready to start their climb up to the roof…