NEW YORK (AP).- A former art gallery director was convicted Wednesday in an art fraud case that brought Robert De Niro to a witness stand to discuss a role he generally plays behind the scenes: artist’s son. Leigh Morse was found guilty of scheming to defraud four artists’ estates by selling their works without telling them. But she was acquitted of a more serious grand larceny charge that specifically involved the estate of De Niro’s artist father. The charges against Morse stemmed from a more sweeping case against her former boss, now-imprisoned ex-gallery owner and admitted swindler Lawrence Salander. Morse’s lawyer said she had nothing to do with Salander’s $120 million scheme. Morse, 55, could face up to four years in prison but won’t necessarily get any time behind bars at her sentencing, set for June 3. Morse “systematically looted the estates of her clients over a period of many years,”