"Death Witnesses"
The Roman Guards
There were two separate groups of Roman soldiers given the task of ensuring the death of Jesus: the executioners and the tomb guards. The soldiers in charge of execution were specialists in capital punishment. Jesus was nailed to a cross after enduring horrible beatings at the hands of these professional death merchants, and every person put to death by way of crucifixion was dealt with by these soldiers. Their job was to ensure the task was completed, and would themselves have been executed if it were shown that their victim had survived. These soldiers made certain that Jesus was dead before His body was allowed to be taken from the cross.
The second group of soldiers was given the task of guarding the tomb of Jesus because of the request made to Pilate by the Sanhedrin. Matthew 27:62-66 tells us “On the next day, which followed the Day of Preparation, the chief priests and Pharisees gathered together to Pilate, saying, ’sir, we remember, while He was still alive, how that deceiver said, “After three days I will rise.” Therefore command that the tomb be made secure until the third day, lest His disciples come by night and steal Him away, and say to the people, "He has risen from the dead." So the last deception will be worse than the first.' Pilate said to them, 'You have a guard; go your way, make it as secure as you know how.' So they went and made the tomb secure, sealing the stone and setting the guard" . These guards ensured that the tomb was secure, and their lives depended upon completion of their mission.
Pontius Pilate
Pilate gave the order for Jesus to be crucified and entrusted this task to be carried out by a Roman centurion, a trusted commander of 100 Roman soldiers. After the crucifixion, a request for the body of Jesus was made by Joseph of Arimathea, in order that His body could be placed in a tomb. Only after confirmation was given to him by his centurion did Pilate release the body. "...Joseph of Arimathea, a prominent council member, who was himself waiting for the kingdom of God, coming and taking courage, went in to Pilate and asked for the body of Jesus. Pilate marveled that He was already dead; and summoning the centurion, he asked him if He had been dead for some time. And when he found out from the centurion, he granted the body to Joseph” Pilate was completely satisfied that Jesus was truly dead.
The Sanhedrin
The Sanhedrin was the ruling council of the Jewish people, and they requested that the bodies of those crucified, including Jesus, be taken down from the cross after their death because of the ensuing Sabbath day. John 19:31-37: “Therefore, because it was the Preparation Day, that the bodies should not remain on the cross on the Sabbath (for that Sabbath was a high day), the Jews asked Pilate that their legs might be broken, and that they might be taken away. Then the soldiers came and broke the legs of the first and of the other who was crucified with Him. But when they came to Jesus and saw that He was already dead, they did not break His legs. But one of the soldiers pierced His side with a spear, and immediately blood and water came out.’” These Jews who demanded that Jesus be crucified would never have allowed Jesus’ body to be removed from the cross were He not already dead. These men were completely satisfied that Jesus was truly dead.