en ▁Ho ▁Lee ▁apparently ▁in ▁the ▁clear , ▁the ▁F BI ▁continued ▁its ▁attempt ▁to ▁find ▁evidence ▁to ▁imp licate ▁Lee ▁in ▁comm itting ▁esp ion age ▁for ▁the ▁P RC . ▁There ▁were ▁ 6 0 ▁agents ▁and ▁more ▁assigned ▁to ▁Lee ' s ▁case , ▁working ▁to ▁prove ▁that ▁he ▁was ▁a ▁sp y . ▁The ▁F BI ▁conducted ▁a ▁search ▁of ▁Lee ' s ▁house ▁on ▁April ▁ 1 0 , ▁se izing ▁any ▁item ▁related ▁to ▁computers ▁or ▁computing , ▁as ▁well ▁as ▁anything ▁that ▁had ▁not ations ▁written ▁in ▁Chinese . ▁The ▁F BI ▁and ▁the ▁Department ▁of ▁Energy ▁then ▁decided ▁to ▁conduct ▁a ▁full ▁for ens ic ▁exam ination ▁of ▁Lee ' s ▁office ▁computer . ▁The ▁exam ination ▁of ▁Lee ' s ▁computer ▁determined ▁that ▁he ▁had ▁back ed ▁up ▁his ▁work ▁files , ▁which ▁were ▁restricted ▁though ▁not ▁class ified , ▁onto ▁t apes , ▁and ▁had ▁also ▁transferred ▁these ▁files ▁from ▁a ▁system ▁used ▁for ▁processing ▁class ified ▁data ▁onto ▁another , ▁also ▁secure , ▁system ▁designated ▁for ▁un class ified ▁data . ▁ ▁After ▁the ▁F BI ▁discovered ▁Lee ' s ▁transfer , ▁they ▁rev oked ▁his ▁bad ge ▁access ▁and ▁clear ance , ▁including ▁his ▁ability ▁to ▁access ▁the ▁data ▁from ▁the ▁un class ified ▁but ▁secure ▁network . ▁Lee ▁then ▁requested ▁from ▁a ▁colle ague ▁in ▁another ▁part ▁of ▁Los ▁Al amos ▁to ▁be ▁allowed ▁to ▁use ▁his ▁computer , ▁at ▁which ▁time ▁he ▁transferred ▁the ▁data ▁to ▁a ▁third ▁un