The stories of Mark and Matthew are similar,
and possibly dependent on Paul's account in 1 Corinithians.
Luke's account adds further liturgical detail,
but is less hostile to Judas as the traitor.
John's tale is, of course, completely different,
introducing a different purpose for and message from Jesus.

They all open by identifying a plot against Jesus
and, after a diversion about anointing,
go on to identify Judas as a traitor.
It is good to have someone to blame!

The donor of the meal is not identified,
possibly as a security measure,
but we then go straight to a story of Jesus
identifying Judas as the one who will betray him.
(though John adds the account of foot-washing.)

That is followed by the creation of the liturgy,
the breaking of bread and the offering of the cup,
before they all depart to the Mount of Olives.
All deny that they will ever disown Jesus,
which is the guilt that Peter later
carries to his death-bed.

Gethsemane
At Gethsemane, Jesus prays, the disciples sleep
and eventually Judas turns up with soldiers
(carrying arms was otherwise forbidden).
to escort Jesus to the meeting
that he had arranged as asked.

The disciples misunderstand and attack,
(and later misreport the whole incdent)
but Jesus calms the situation
and goes off to a meeting
with the council.

The disciples took fright and fled.
Only Peter followed Jesus and that briefly,
but he was in no position to report events.
What happened from then on is largely invention,
or conjecture based on the observable fact
that Jesus was led out for crucifixion.

Was he arrested, or was the meeting arranged?
This is less like a story of betrayal than of a meeting which went wrong;
at which Jesus overplayed his hand and was condemned, as a result.
The gospel writers portray one solution, but
the other seems a more likely situation
and more in-line with
the ways of Jesus.

So we may see Judas as the fall guy,
the Treasurer whom Jesus trusted to arrange things:
the colt, the supper venue, the meeting with authority.
This made others jealous, generating a spiral of suspicion
and then accusation, exclusion from the group.
Rejected and despairing, he hanged himself.
Yet he was, perhaps, the closest follower;
the only one who did not run away.