Regulatory body wasn’t aware Ottawa dentist suspected in double-murder suicide was on probation  CTV NewsDentist allegedly kills young sons, himself, sets practice on fire  DrBicuspid.comDad Who Killed 2 Sons Left Trail of Disturbing Messages to Ex Before Murder-Suicide  People.comOttowa brothers, 7 and 12, found slaughtered after sickening email arrives in inbox  The Mirror USDentist murdered his 2 young sons and firebombed his practice before killing himself in vehicle blaze  New York Post