In this June 18, 2015 photo, Moses Cabrera, left, who had polycystic kidney disease (PKD), poses for photo with his son Moses Jr. outside his home in Arlington, Texas. PKD is a hereditary condition that eventually destroys the organ if left untreated. In the late 1980s, Moses Cabrera underwent a kidney transplant and it's been smooth going since -- an experience that has helped him guide son, a Grapevine police office who was also diagnosed with PKD. (Louis DeLuca/The Dallas Morning News via AP) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET USE BY AP MEMBERS ONLY; NO SALES
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