In the process of emails between various artists, it turned out there were pieces of art from other artist's work that she also represented as her own, fibre, stained class and paintings. She had been banned already from one painting instructors class for copying the teachers work. When accused the artist offered up various excuses but finally under pressure she closed her website, supposedly remove all offending pieces and opened a new site. She was also removed from one gallery that she exhibited at.
Hard to believe that anyone is so naïve as not to be aware of COPYRIGHT. On a larger scale I have since heard from another artist about a company that stole a painter's image and printed it on thousands of t-shirts in China.
As most artists cannot afford to pay for copyright on every piece they produce and going to court is another; my suggestions.....document, document, document and whenever possible add watermarks.