Acts 4:14

‘And seeing the man that was healed standing with them, they could say nothing against it.'

They now found themselves in a quandary. On the one hand they saw the man who had been healed standing among them and recognised that nothing wrong had been done in his healing. Apart from the fact that the Name of Jesus had been brought into it they could see nothing against it. But on the other was that these men were reviving the interest in the Name and the teaching of Jesus. This they could not allow. The man had been executed as a criminal and accursed by being hung on a tree (Deuteronomy 21:22 compare Galatians 3:13)

Really, of course, they should have gone the one step further and acknowledged that the healing of this man clearly vindicated the name of Jesus. But their minds were closed. That was something that they would not do, and in view of what they had done to Him it was not too surprising. It would have been a matter of admitting their own bloodguiltiness.