A Rhode Island fugitive who had been on the run for 20 years and was featured on “America’s Most Wanted” was captured by US Marshals on his sailboat off the coast of New York. Ronald L. Fischer was tracked down by federal agents to his 56-foot-long sailing vessel “The Silver Lining” about an hour offshore on Thursday, ending a decades-long wild goose chase to take down the sex offender, according to the US Marshals Service. Fischer, 70, had been on the lam since 2005 when he fled Rhode Island during his criminal trial in Newport for allegedly raping a woman…