John Walsh will tape "America's Most Wanted" Tuesday morning from the Leawood swimming pool where Ali Kemp was murdered. The show, to air at 8 p.m. Saturday on Fox, will ask viewers to help solve the cases of Kemp, Precious Doe and women whose bodies were found in the Missouri River. They also will feature the case of Tabitha Brewer, a 16-year-old girl who disappeared from Shawnee with her boyfriend in 1998. Her boyfriend, Nick Travis, was found dead four months later in a Kansas City neighborhood, and Tabitha's purse was found there. The show will be taped at 8:30...