NEW YORK — Brooke Astor's 85-year-old son was convicted yesterday of exploiting his philanthropist mother's failing mind and helping himself to her nearly $200 million fortune.

After a five-month trial, Anthony Marshall now faces a mandatory prison sentence of at least one year — and perhaps up to 25.

His mother, a New York society doyenne, was 105 and had Alzheimer's disease when she died in 2007. Marshall was accused of everything from scheming to inherit millions of dollars to simply stealing artwork off her walls. His co-defendant, estate lawyer Francis X. Morrissey Jr., was accused of helping manipulate the confused Astor into changing her will to leave Marshall millions of dollars that had been destined for charity.

JACKSON'S DOCTOR IN CHILD-SUPPORT TROUBLE

LAS VEGAS — The doctor at the center of an investigation into Michael Jackson's death may face arrest after missing a hearing to explain late child support payments.

Las Vegas district attorney David Roger said yesterday that a judge could approve an arrest warrant for Dr. Conrad Murray, sought by a family court official, within 10 days. Roger says Murray, who owes $13,000 in child support, can object to the warrant before a judge decides on it.

KEY EVIDENCE IN TRAVOLTA PLOT DESTROYED

NASSAU, Bahamas — A Bahamas police officer testified yesterday that a woman on trial for allegedly trying to blackmail John Travolta for $25 million acknowledged burning a document at the center of the case.

Pleasant Bridgewater, one of two defendants in the alleged plot, told police the day she was arrested that she had destroyed the form with Travolta's signature "after she noticed the situation was about to explode," a detective said.

The document related to the decision on treating Travolta's 16-year-old son, Jett, after he suffered a seizure Jan. 2 at a family vacation home on Grand Bahama island. The teen died at a hospital shortly after.

SPIELBERG GIVEN HUMANITARIAN AWARD

PHILADELPHIA — Filmmaker Steven Spielberg, long recognized for his artistic achievements, was honored with the Liberty Medal yesterday for his compassion and humanitarian work.

Former President Bill Clinton presented the medal to Spielberg at the National Constitution Center, where the exhibits focus on the history of the U.S. Constitution. The center gives the annual award to those whose actions it says represent the founding principles of the U.S.

Spielberg's movies include the Holocaust drama "Schindler's List" and the World War II epic "Saving Private Ryan," which both won him Oscars.