Suspected car thief was running away from crash when struggle ensued.
Tried to push him off roof, report shows.
An unmarked city police car was involved in an accident in south St. Louis Friday night.
Suffered paralysis after being shot by burglary suspect last week.
Family told Thursday
Search that turned up crack pipe was illegal.
Officer injured in an accident in South St. Louis
Suspect also struck a building, several cars during getaway attempt.
Police seek two others in connection with holdup.
Dominic Webb was critically wounded, but expected to survive.