As the final phase of the probe into the death of Robert Dziekanski begins in Vancouver, a former B.C. attorney general warns such public inquiries should be very cautious about making findings of misconduct.

Geoff Plant says inquiries don't offer the same legal protections as formal trials but have the potential to ruin reputations and destroy careers.

Commissioner Thomas Braidwood has warned four RCMP officers who jolted Dziekanski with a Taser that he may consider findings of misconduct following a lengthy hearing into the October 2007 death.

Final submissions at the inquiry begin this morning and continue next week, with more than a dozen lawyers slated to make closing arguments.