05/12/2010 06:19 pm ET Updated May 25, 2011

Tyler Lambert Suicide: Dana Plato's Son Kills Himself

First Joni Richardson endured the death of her daughter-in-law, Diff'rent Strokes star Dana Plato, in 1999. Now almost exactly 11 years later, Plato's son, Tyler Lambert, committed suicide at the age of 25.

"It's a shame that such a talented human being would do this with his life," Richardson tells PEOPLE. "He had all the opportunities in the world and we just can't understand it."

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