I think Jesus said it best, in John 8:5--...he that is without sin among you, let him cast the first stone. I know many a Believer thinks of John 7:53-8:11; as spurious but along with Jewish Feasts explaining these verses I think God left a landmark in Jeremiah to affirm this passage, Proverbs 22:28; 23:10.
For we see in John 7:2 it is the Feast of Tabernacle, them in John 7:37-39 Jesus speaks on the last day of the Feast. So many scholars question if John 7:53-8:11 is authentic why does it state: And every man when into his own house. John 7:53. Will simply because of the 7 day feast of Tabernacle after this last day the Jews whom stay in their booth/sukkot/tabernacle would have gone home.
As for the Landmark since i am having all sorts of trouble typing on my smart phone to see what Jesus wrote the first time in the ground just read Jeremiah 17:13. For in John 7:37-39 we see Jesus as the Fountain of Living Water. The second the Lord just wrote down their names.
Back to the main point save Jesus Christ not one of us has the power to condemn, for we all have sins, Romans 8:34 do we dare to judge a brother or sister in Christ whom God has for-given. We all should earnestly pray for the family that God will help to mend the hurt relationships.
I know my own faults far to will to stand in judgment of a brother in Christ, so yes Josh sin greatly but thank God we have a BIG GOD, Who so gracious to all us sinners, for as Paul I consider myself the chiefest of all sinners, see Romans 7:13-25 and especially I Timothy 1:15.
Let us all however learn to take heed were stand lest we fall, I Corinthians 10:12.