Why did kate barlow become an outlaw?

Kate Barlow was a loved member of the community.She was known for her spiced peaches and her love for the children she taught.The person she loved was killed by the town, which angered her and turned her into a villain.She was known as the Devil Woman because of her love for Sam the Onion Man who was a negro.Most people in the country know her as Kissin Kate Barlow.Kissin' Kate has killed a lot of people with her guns and quick horses, but she has left some of her victims in the desert.Where did she bury her treasure?