一点想法：那个啥的，仅供参考

feigning a seizure：假装昏倒的样子
》假装癫痫发作

causing the "innocent" boy's fit：致使“无辜的”年轻人昏倒了
》致使“无辜的”年轻人疾病发作

his case is weak：他的案件很弱
》很难立案

As he cradles his head in despair：正当他无可柰何摇头的时候
》无可柰何地抱头时- cradle：用双臂抱合