Ok, I'll put the amoral monster response as a direct reply and keep this branch about the tomb.

The location of the tomb was well known to three different groups.

One -- Jesus' followers: It was Joseph of Arimathea's tomb. Joseph and Nicodemus prepared his body for burial. In addition to moving the body, they had forty pounds of spices. (The amount of physical effort involved probably made their destination more memorable) And some women saw him placed in the tomb (Mary Magdalene, and Mary the mother of James and Joseph, and the mother of the sons of Zebedee). That women are listed as witnesses is notable because in that culture, the testimony of women was not acceptable. This was messy reality, not a clean fiction.

Two -- The Jewish religious leaders did not want Jesus' followers to stage his resurrection. So they asked the Romans to guard the tomb. "The chief priests and the Pharisees gathered together with Pilate, [63] and said, “Sir, we remember that when He was still alive that deceiver said, ‘After three days I am to rise again.’ [64] Therefore, give orders for the grave to be made secure until the third day, otherwise His disciples may come and steal Him away and say to the people, ‘He has risen from the dead,’ and the last deception will be worse than the first.” [65] Pilate said to them, “You have a guard; go, make it as secure as you know how.” [66] And they went and made the grave secure, and along with the guard they set a seal on the stone."

Three -- The Romans knew where the tomb was because they guarded it. Roman guards knew any security failure could be penalized by death ordered by their superior officer. The Romans were also the ones approached by Joseph of Arimathea so there's a second reason they'd know where Jesus' body was. They set a seal on the stone as well, and the penalty for violating the seal was death.

The Jews and the Romans were motivated to keep the status quo. But Christianity and copies of his followers' writings sprang up like wildfire within the lifetime of eyewitness. The Romans could not squash the new movement. One thing would have helped: if they could just produce the rotting corpse from the correct tomb. But they couldn't. Neither could the Jews ask the Romans to do so (it being forbidden in Jewish custom to touch a corpse). Because the tomb's location and emptiness was well-known.

Besides, his eleven remaining disciples and other close followers said they interacted with the risen Jesus for a period of 40 days (including being served fish by his hands, touching him, his appearing to over 500 people, and many other convincing proofs). And these eyewitness refused to recant on pain of torture and horrible death (or exile in the case of John).

This is very unlike their former manner, which was cowardly. (Another hallmark of a reliable record -- it didn't protect the disciples from appearing as stupid as they were, fighting over who'd be the greatest or misunderstanding Jesus at times)

Such a change in courage is consistent with seeing that their leader really was God the Son come back to life, in the flesh.

It's not consistent with the idea they mis-remembered or lied deliberately at the cost of their own lives.