. ▁Michael ▁D . ▁Rob b ins , ▁one ▁of ▁the ▁att or ne ys ▁representing ▁the ▁Mc Donald ▁estate , ▁said ▁his ▁initial ▁thoughts ▁were ▁that ▁" I ▁didn ' t ▁think ▁there ▁was ▁a ▁case ▁if ▁he ▁had ▁lung ed ▁at ▁a ▁police ▁officer ," ▁adding , ▁" The ▁police ▁narr ative , ▁without ▁exception , ▁is ▁that ▁the ▁use ▁of ▁force ▁is ▁just ified ▁and ▁necessary , ▁which ▁it ▁sometimes ▁is ." ▁ ▁One ▁police ▁report ▁described ▁that ▁Mc Donald ▁" ra ised ▁the ▁kn ife ▁across ▁ch est " ▁and ▁pointed ▁it ▁at ▁Van ▁Dy ke . ▁Van ▁Dy ke ▁told ▁investig ators ▁that ▁he ▁fe ared ▁Mc Donald ▁would ▁r ush ▁him ▁with ▁the ▁kn ife ▁or ▁throw ▁it ▁at ▁him , ▁and ▁he ▁also ▁re called ▁a ▁ 2 0 1 2 ▁Police ▁Department ▁bullet in ▁warning ▁about ▁a ▁kn ife ▁that ▁was ▁also ▁capable ▁of ▁firing ▁a ▁bullet , ▁as ▁well ▁as ▁throwing ▁kn ives ▁and ▁also ▁spring - loaded ▁kn ives ▁capable ▁of ▁prop elling ▁the ▁bla de . ▁One ▁report ▁noted ▁that ▁Mc Donald ' s ▁kn ife ▁" was ▁in ▁the ▁open ▁position " ▁but , ▁when ▁announ cing ▁charges ▁against ▁Van ▁Dy ke , ▁Cook ▁County ▁State ' s ▁Att orney ▁An ita ▁Al vare z ▁said ▁the ▁kn ife ▁was ▁found ▁fol ded ▁at ▁the ▁scene . ▁ ▁Medical ▁report ▁According ▁to ▁the ▁Cook ▁County ▁Medical ▁Ex am iner ' s ▁Office ' s ▁aut ops y ▁report , ▁which ▁was