Jesus revealed to the twelve that one of them would betray Him, and they all asked whether they themselves were the one, including Judas,
“Then Judas, who was betraying Him, answered and said, ‘Rabbi, is it I?’ He said to him, ‘You have said it’” (Matthew 26:25).
It is interesting that Matthew noted for us that Judas was in the process of betraying Jesus, yet, because the others had asked whether they themselves would betray Him, Judas could not remain silent, but had to put on a face of innocence like the rest.
He failed to realize that if Jesus knew one of them would betray Him, then Jesus also knew who would do the betraying, even as He had revealed in the past three and a half years that He knew what people were thinking.
We can fool others with seeming innocence, but no one can fool the Lord.