Why would the Chief Priest need a signal to mark who Jesus was?
Did they not know what he looked like?
Was it too late in the day to tell?
Did Jesus and the disciples all wear the same clothes?
This detail in scripture just seems strange.
44*Now the betrayer had given them a sign, saying, “The one I shall kiss is the man; seize him and lead him away safely.”
45*And when he came, he went up to him at once, and said, “Master!” And he kissed him.
46*And they laid hands on him and seized him.
The Holy Bible. (2006). (Revised Standard Version; Second Catholic Edition., Mk 14:44–46). San Francisco: Ignatius Press.