Would you re-baptise a now repentant person who was previously put out of the church for unrepentant sin?

Someone asked me a question yesterday. If somebody was put out of your church due to unrepentant sin, then came back repentant later on, would

Were those who fall away from Christ ever truly saved?

As a church, we have been preaching through the book of Numbers. To supplement that teaching, we have been pressing into the points of application