Nobody Heard About The Law
The solution was simple and good actually. See, Kate was able to go home and she will not have to worry about the criminal record or going to prison. She will not have to do anything now and she is a free person. She is ready to enjoy her life more than ever before.
Nobody knows who stole the artifact. Some people think that Kate did this. Others claim that the police officer did it. Some even claim that people from the museum came and stole it. Nobody knows the truth. It is still a mystery and one of the biggest ones known to men.