Federal case against Robinson is dismissedKANSAS CITY, Mo. — A federal judge on Friday granted a request by prosecutors to dismiss a potential death penalty against convicted serial killer John E. Robinson Sr.U.S. District Judge Gary Fenner dismissed the case without prejudice, meaning it could be refiled if Robinson’s convictions and death sentence in Kansas are overturned.His attorneys had wanted the case dismissed with prejudice, which would have prevented it from being refiled.Robinson, 62, was charged in U.S. District Court with kidnapping resulting in death, which can be punishable by death.Fenner dismissed the case Friday and ordered that Robinson be returned to custody in Kansas.Robinson, 62. formerly of Olathe, pleaded guilty to five killings in Missouri and was convicted of three in Johnson County, Kan., over a 15-year period.He was sentenced to death for two killings, those of Suzette Trouten and fzabela Lewicka.