The crowds that went ahead of him and those that followed shouted, "Hosanna to the Son of David!" "Blessed is he who comes in the name of the Lord!" "Hosanna in the highest!"  When Jesus entered Jerusalem, the whole city was stirred and asked, "Who is this?" The crowds answered, "This is Jesus, the prophet from Nazareth in Galilee." ~~Matthew 21: 8-11

Within a span of five days, he had spoken in the temple, eaten the Passover Meal (The Seder) with The Twelve, was arrested and condemned to die. Seized in the Garden of Gethsemane after an emotional and heart-wrenching conversation with His Heavenly Father, He was taken to the high priest, Caiaphas, then to the governor, Pilate. 

Pilate, forewarned by his wife not to "have anything to do with that innocent man..." (Matthew 27:19b), and learning that Jesus was a Galilean, sent Him to Herod, who happened to be in Jerusalem at the time.  In front of Herod, Jesus was tested, accused, ridiculed, and mocked. Dressing him in an elegant robe, they sent him back to Pilate. ~~Matthew 23:11b

Once again in front of Pilate, the Governor attempted to "get out of the situation" by reminding the crowd that during the Feast of the Passover, it was his custom to release a prisoner chosen by them.  He gave them a choice, the notorious Barabbas, or Jesus, the man they had shouted Hosanna to just a few short days before.

The crowd chose Barabbas.

"What shall I do, then, with Jesus who is called Christ?" Pilate asked. They all answered, "Crucify him!"...Then he released Barabbas to them.  But he had Jesus flogged, and handed him over to be crucified. ~~Excerpts from Matthew 27:22-26.