United Kingdom, Aug. 28 -- Katy Perry has been slammed by the family of the ailing Army veteran she is fighting in court.

The singer, 40, has been pursuing $6 million in damages in a long-running legal dispute over a $15 million mansion in California and has been locked in a court battle with Carl Westcott, 85, over the cash -a terminally ill veteran who is bedridden with an incurable brain disorder.

Katy is seeking compensation for alleged property damage and back rent, while Carl continues to fight for the remainder of the purchase price for the Montecito home.

Carl's son Chart Westcott has now told The US Sun about the dispute: "Katy talks about seeking 'justice', but for five years my family has endured a painful legal battle while...