Matthew 27:1-4 - I have betrayed innocent blood

27:1,2

Here we see men making their plans, and one man deeply regretting his plan. The Jewish religious leaders did not have the right to put someone to death, only Pilate, the Roman governor, could do that. So they had Jesus handed over to Pilate. 

27:3,4

Judas was the man who now deeply regretted his actions. Many things can seem a good idea, but once we enact them we suddenly realise what a foolish or wrong thing to do it was. Sin works like that, it is utterly deceptive. Judas sought to make amends for his actions, returning the thirty pieces of silver to the chief priests. “For I have betrayed innocent blood”. However, the chief priests were not interested. They were still full of their own evil intent, following through their plans to kill Jesus.