▁Ros si , ▁who ▁is ▁seen ▁to ▁coun sel ▁her ▁while ▁they ▁are ▁on ▁cases . ▁However , ▁Jordan ▁has ▁cl ashed ▁several ▁times ▁with ▁Unit ▁Chief ▁A aron ▁Hot ch ner . ▁She ▁eventually ▁leaves ▁when ▁she ▁dec ides ▁she ▁can ' t ▁handle ▁the ▁stress ▁that ▁comes ▁with ▁her ▁job . ▁ ▁D iana ▁Re id ▁( J ane ▁Lyn ch ; ▁seasons ▁ 1 , ▁ 2 , ▁ 4 , ▁ 1 2 ▁& ▁ 1 5 ) ▁is ▁the ▁mother ▁of ▁B AU ▁team ▁member ▁Dr . ▁Sp encer ▁Re id . ▁Like ▁her ▁son , ▁she ▁has ▁a ▁high ▁I Q . ▁She ▁was ▁once ▁a ▁university ▁professor ▁of ▁literature , ▁but ▁suff ers ▁from ▁sch iz op hren ia ▁and ▁is ▁hospital ized ▁in ▁a ▁Las ▁Veg as ▁san it arium , ▁where ▁Sp encer ▁committed ▁her ▁when ▁he ▁was ▁ 1 8 . ▁Her ▁husband , ▁William ▁Re id , ▁left ▁prior ▁to ▁her ▁diagn osis , ▁because ▁of ▁his ▁in ability ▁to ▁co pe ▁with ▁her ▁ill ness , ▁and ▁he ▁could ▁not ▁deal ▁with ▁protect ing ▁her ▁after ▁she ▁witness ed ▁a ▁murder . ▁She ▁is ▁functional ▁when ▁on ▁her ▁medic ation , ▁but ▁frequently ▁la ps es ▁into ▁regression ▁to ▁her ▁university ▁career . ▁D iana ▁spent ▁much ▁time ▁reading ▁al oud ▁to ▁Sp encer ▁while ▁he ▁was ▁growing ▁up , ▁and ▁he ▁continues ▁to ▁write ▁her ▁a ▁letter ▁every ▁day . ▁She ▁is ▁proud ▁of ▁her ▁son ▁but ▁disapp ro ves