The author of the gospel of John is an eyewitness to the crucifixion and the resurrection of Jesus. He is referred to as the “the disciple whom Jesus loved.” He was the one who Jesus asks to take care of his mother for him.
Jesus endures a mockery of a trial and is sentenced to death by crucifixion. The Roman soldiers beat him and mock him by putting on him a purple robe, a crown of thorns, and a sign on the cross that says: “King of the Jews.”
The soldiers nail Jesus to the cross. His cross is between two thieves. Eventually, Jesus cries out “It is finished” loud enough for John and the others there to hear.
John points out several of the prophecies that were fulfilled that day including the fact that Jesus was pierced. Doctors verify that the fact that water and blood came pouring out of that wound means Jesus was dead.
Jesus had accomplished his mission. He took upon himself the sins of humanity, and it killed him.