They first arrived at the prison where the incident occurred last night to observe the situation.
They found a large hole in the wall of the prison where Lin Yifan was held, not sure who was responsible.
From the scattered bricks on the ground, they deduced that the hole was made from the inside out, which means it was created by someone in the adjacent cell, implying activity in that cell.
Why do they say that? Because in the adjacent cell, they couldn't find any bricks fallen on the ground, so the force came from that cell and struck Lin Yifan's cell.
Why did this person break into Lin Yifan's cell? They guessed that this person was definitely there to rescue Lin Yifan because the clan wouldn't take such great efforts to attack one person in this manner.
In other words, Ding Huo was in the adjacent cell, not on the first-floor cell.
This conflicted with what the prison guards stated, so the clan asked, "Are you sure Ding Huo was held in the first-floor cell last night?"
