. >> his name is ray gricar. when he vanished in 2005, it was a big story. >> prosecutor in pennsylvania that vanished friday is still missing. >> now, ray's story is linked to an even bigger one. >> stunning allegations of sexual child abuse. >> one of the biggest names in sports is enveloped in scandal. >> ray gricar decided not to prosecute him for the first known allegation of sex abuse against him. now some are asking whether that sandusky case had anything to do with the d.a.'s disappearance. >> for anyone to think there is no relationship is the epitome of nie i have ta. >> others say no way. >> eliminating ray doesn't eliminate the problem for anybody. >> when the sandusky scandal broke, "dateline" began analyzing clues, digging into the case, talking to those who knew the d.a. from center county. there are several scenarios of his disappearance. tonight, we look for answers what happened to ray gricar. >> ray, i love you very much and i miss you. >> he was the district attorney in pennsylvania's centre co