1) "mistrust with her...findings..." 是错的;
2) 正确的介词是 of :" mistrust (of) her...findings..."
原因:"mistrust" 是动作/行动,"an action"; 什么"行动"呢?必须用来 "of" 接!
例(a) Jane was killed = the killing (of) Jane;
例(b)the findings were mistrusted/not trusted = the mistrust (of) her findings;
(c) the destruction (of) the building/ W.T.O.on 911
(d) the disappearance (of) MH370 from the radar on 8 March 2014...