Ruby capped Oswald because he was very upset that he (Oswald) had killed his president and also he was doing it so Jackie wouldn't have to go thru the agony of a trial. Ruby actually thought that he was going to be regarded as a hero.
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It was a wonderful community with some very enjoyable members. But the vast majority were like German housewives circa 1943 prenteding that horrib;le smell wafting through their open windowsd was just the neighbors having a cookout..--Windsock