How does Leonardo distinguish Judas from the rest of the apostles in the Last Supper?

As I recall Judas was facing away from Jesus.

Perhaps this was an indication of shame or fear in Leonardo's interperation.

Firstmate

Leonardo used several ways to distinguish Judas Iscariot from the rest of the apostles in his depiction of the last supper. Some of his ways were not traditionally used by others who had painted the same scene in the past, however, they made the painting more dramatic. First, Judas is holding a bad of silver in his right hand. This would symbolize the money he was paid to betray Jesus. Also, he is reaching for the same bread as Jesus with his left hand. This would signify Jesus' Words that "the first to eat of the bread will be the one to betray me."