1 0 ▁FIFA ▁World ▁Cup , ▁and ▁UEFA ▁Euro ▁ 2 0 1 2 . ▁ ▁In ▁ 2 0 0 7 , ▁he ▁ref ere ed ▁five ▁matches ▁at ▁the ▁ 2 0 0 7 ▁FIFA ▁U - 2 0 ▁World ▁Cup , ▁including ▁the ▁semi - final ▁between ▁Chile ▁and ▁Argentina . ▁The ▁match ▁finished ▁as ▁a ▁ 3 – 0 ▁win ▁for ▁Argentina ▁with ▁St ark ▁issu ing ▁seven ▁yellow ▁cards ▁( out ▁of ▁nine ) ▁and ▁two ▁red ▁cards ▁against ▁the ▁Chile an ▁team . ▁Following ▁the ▁match , ▁the ▁Chile an ▁players ▁were ▁rest rained ▁by ▁members ▁of ▁the ▁Toronto ▁Police ▁when ▁they ▁approached ▁to ▁meet ▁fans ▁outside ▁the ▁ar ena , ▁as ▁the ▁police ▁misunder stood ▁the ▁players ' ▁original ▁intent ions . ▁The ▁misunder standing ▁led ▁the ▁police ▁to ▁ag gress ively ▁rest rain ▁Chile an ▁players ▁who ▁def ended ▁fier c ely , ▁causing ▁the ▁use ▁of ▁electric ity ▁and ▁pe pper ▁gas ▁by ▁the ▁police . ▁Some ▁players ▁were ▁ ▁det ained ▁for ▁several ▁hours ▁before ▁being ▁released . ▁St ark ▁left ▁the ▁stad ium ▁under ▁esc ort , ▁although ▁he ▁was ▁not ▁involved ▁in ▁the ▁cl ash . ▁ ▁St ark ▁retired ▁from ▁offici ating ▁in ▁ 2 0 1 7 ▁because ▁he ▁reached ▁the ▁age ▁limit ▁for ▁German ▁ref ere es , ▁which ▁is ▁ 4 7 . ▁His ▁final ▁Bundes liga ▁match ▁offici ated ▁was ▁between ▁Bor uss ia ▁M ön ch eng lad bach ▁and ▁D arm stadt ▁ 9