Sumner Redstone in recent years

Sumner Redstone, right, and members of the USC marching band are shown at the dedication of the Sumner Redstone Production Studios at USC on Feb. 5, 2013.

Sumner Redstone, seated, was honored by the Hollywood Chamber of Commerce with a star on the Hollywood Walk of Fame on March 30, 2012.

Philippe Dauman, left, now the chief executive of Viacom, and Sumner Redstone are photographed at Redstone’s home in Beverly Hills on September 27, 2007.

Sumner Redstone and his then-wife, Paula Fortunato, attend the premiere of Paramount’s “Zodiac” in Los Angeles on March 1, 2007.

Paramount Pictures Chief Executive Brad Grey, from left, Sumner Redstone and producer Brian Grazer attend the Friends of the Los Angeles Free Clinic annual gala at the Beverly Hilton Hotel on Nov. 20, 2006.

Actor Clint Eastwood, from left, businessman Sumner Redstone, director Steven Spielberg and Paramount Pictures Chief Executive Brad Grey attend the Paramount Pictures premiere of “Flags of Our Fathers” in Beverly Hills on Oct. 9, 2006.

Sumner Redstone poses with his then-wife, Paula Fortunato, at their Beverly Hills home on June 10, 2005.

Businessman Sumner Redstone is photographed in a screening room at National Amusements on Oct. 2, 1998.

From left, Sumner Redstone’s then-wife, Phyllis Raphael, poses with Sumner Redstone, Sherry Lansing, Wendy Neuss and Patrick Stewart at the National Conference of Christians and Jews’ annual Humanitarian Award Dinner on April 23, 1998, at which businessman Sumner Redstone was honored.