August 14, 2012
FILE - This June 8, 2008 file photo shows actor Ron Palillo at the TV Land Awards in Santa Monica, Calif. Palillo, best known as the nerdy high schooler Arnold Horshack on "Welcome Back, Kotter," died Tuesday, Aug. 14, 2012, in Palm Beach Gardens, Fla., of an apparent heart attack. He was 63. (AP Photo/Mark Mainz, file)
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The actor best known as the nerdy high-school student Arnold Horshack on "Welcome Back, Kotter," has died in Florida.