More than 40 people bought what they thought were original paintings by Max, but were in fact prints to which the seller had added paint and signatures

The renowned Pop artist, who has suffered from Alzheimer’s-induced dementia for the better part of a decade, is at the centre of a years-long legal war

The artist has been the subject of legal complaints for years regarding both his business and personal care

Libra Max previously sued to end Barbara Lissner’s guardianship of her father; now Lissner has sued back, alleging that Libra Max’s legal and public relations campaign defamed her