John Gill Commentary Mark 15:4

"And Pilate again asked him, saying, Answerest thou nothing? behold how many things they accuse thee of." — Mark 15:4 (ASV)

And Pilate asked him again
In the presence of the chief priests, who laid so many things to his charge; for the former question was put, when Jesus and he were alone in the judgment hall, whither the Jews would not enter for fear of being defiled; see (John 18:28John 18:33) ;

saying, answerest thou nothing behold how many things they witness
against thee ?
The charges were many, and very heinous, and which Pilate thought called for self-defence; (See Gill on Matthew 27:13).