▁secret ▁police ▁agents ▁that ▁he ▁employed ▁were ▁able ▁to ▁ro am ▁through ▁Ch ang ' an , ▁doing ▁whatever ▁they ▁wished ▁in ▁the ▁em peror ' s ▁name ▁with ▁imp unity . ▁ ▁At ▁Li ▁X ian ' s ▁suggestion , ▁Emperor ▁Su z ong ▁susp ended ▁the ▁secret ▁police ▁agents ' ▁powers , ▁causing ▁LI ▁F ug uo ▁to ▁res ent ▁Li ▁X ian ▁as ▁well . ▁ ▁So on , ▁the ▁issue ▁came ▁to ▁a ▁head ▁when ▁a ▁horse ▁tra iner ▁inside ▁the ▁palace ▁at ▁F eng xi ang ▁Municip ality ▁( i . e ., ▁the ▁former ▁F uf eng ▁Command ery ) ▁committed ▁rob ber y ▁and ▁was ▁captured ▁and ▁executed ▁by ▁the ▁sh er iff ▁of ▁T ian x ing ▁County ▁( 天 <0xE8> <0x88> <0x88> , ▁in ▁modern ▁Ba o ji ) ▁X ie ▁Y if u ▁( <0xE8> <0xAC> <0x9D> <0xE5> <0xA4> <0xB7> <0xE7> <0x94> <0xAB> ). ▁ ▁The ▁tra iner ' s ▁wife ▁protest ed ▁her ▁husband ' s ▁innoc ence ▁to ▁Li ▁F ug uo , ▁who ▁had ▁previously ▁served ▁in ▁the ▁same ▁role ▁and ▁therefore ▁was ▁sympath etic . ▁ ▁Li ▁F ug uo ▁thus ▁ordered ▁re inv estig ations , ▁which ▁were ▁carried ▁out ▁by ▁the ▁officials ▁Sun ▁Y ing ▁( <0xE5> <0xAD> <0xAB> <0xE9> <0x8E> <0xA3> ), ▁C ui ▁Boy ang ▁( <0xE5> <0xB4> <0x94> <0xE4> <0xBC> <0xAF> 陽 ), ▁Li ▁Ye ▁( 李 <0xE6> <0x9B> <0x84> ), ▁and ▁Qu an ▁X ian ▁( <0xE6> <0xAC> <0x8A> <0xE7> <0x8D> <0xBB> )