Why doesn't the Bible state that more than two other people were crucified with Jesus?
My sons, who have left the Church, say there were more than three people crucified when Jesus was killed. Why are the others not mentioned?
Because there weren't any. The Bible, in the accounts of the Crucifixion, mentions only Jesus and the two thieves (Mt 27:37; Mk 15:27; Lk 23:33; Jn 19:18). It says nothing about any other victims. Ask your sons how they know, apart from the biblical evidence, how many people were crucified along with Christ.