yeah would never happen because the interloper would try to kill the mc to prevent future troubles
a commoner treasuring a jade ring is a crime
but stealing the jade ring is still a theft and a thief is also a criminal and thats a major embarressment
so the chances for the thief to let witnesses live is small
he should have killed the girl, framed the mc for it and then tried to assert justice aka kill the mc
also in cultivation country theft is largely frowned upon as a act of the weak
robbing and killing on the other hand is also a crime but an act of power so in essence its better than theft