We can understand what Herod did not do from what Pilate said about himself in verse 14. Alternate translation: "Nor does Herod find guilt in this man" or "Even Herod thinks he is innocent" (See: [[rc://en/ta/man/jit/figs-ellipsis]])
"Herod sent Jesus to return to us." The word "us" refers to Pilate, his soldiers, and the priests and scribes, but not those who were listening to Pilate. (See: [[rc://en/ta/man/jit/figs-exclusive]])
This can be stated in active form. Alternate translation: "he has not done anything to deserve a death sentence" (See: [[rc://en/ta/man/jit/figs-activepassive]])