US District Judge Matthew Leitman said on Wednesday the case against a young Chinese scientist was never about dangerous pathogens. “This is not a case of smuggling in some sort of virus or a crop-destroying something or other. From what I can tell, this material was not a threat at all,” Leitman declared, sentencing Chengxuan Han to time served after three months in jail.Han, in her late 20s, was interrogated for hours upon arriving on an international flight to Detroit earlier this year.