▁Sh eld on , ▁St ella ▁and ▁Adam ▁for ▁going ▁against ▁protocol , ▁but ▁also ▁trust s ▁his ▁team ▁and ▁has ▁repeatedly ▁def ended ▁them ▁from ▁unf air ▁criticism ▁by ▁the ▁b ureau c racy . ▁ ▁Mac ▁is ▁port rayed ▁as ▁a ▁work ah ol ic ▁and ▁is ▁frequently ▁seen ▁working ▁late ▁into ▁the ▁night , ▁after ▁all ▁the ▁staff ▁and ▁his ▁team ▁have ▁gone ▁home . ▁It ▁is ▁partly ▁due ▁to ▁his ▁ins om nia ▁and ▁also ▁his ▁desire ▁and ▁dedic ation ▁to ▁bring ▁crim inals ▁to ▁justice . ▁ ▁Mac ▁bel ieves ▁that ▁comm itting ▁a ▁crime ▁is ▁never ▁just ifiable ▁regardless ▁of ▁the ▁circumstances . ▁This ▁was ▁especially ▁evident ▁in ▁the ▁Season ▁ 6 ▁episode ▁" Black list " ▁when ▁the ▁murder er , ▁who ▁was ▁dying ▁of ▁lung ▁cancer ▁and ▁murder ed ▁the ▁health care ▁profession als ▁he ▁felt ▁were ▁responsible ▁for ▁his ▁condition , ▁attempted ▁to ▁gain ▁Mac ' s ▁sympathy ▁by ▁mention ing ▁Mac ' s ▁father , ▁who ▁died ▁of ▁small - cell ▁lung ▁cancer . ▁Mac ▁ref uses ▁and ▁ret ort s ▁at ▁the ▁suspect , ▁telling ▁him ▁" If ▁you ▁have ▁a ▁message , ▁write ▁your ▁con gress man ." ▁ ▁Mac ▁bel ieves ▁in ▁following ▁the ▁evidence , ▁not ▁trust ing ▁to ▁intu ition . ▁He ▁looks ▁at ▁a ▁crime ▁scene ▁( and ▁often ▁the ▁world ) ▁with ▁Venez iano ' s ▁theory ▁of ▁quantum ▁physics ▁in ▁mind : ▁Everything ▁is ▁connected . ▁In ▁Mac ' s ▁mind , ▁if ▁he ▁and