A former B.C. special prosecutor is facing discipline from the provincial legal society for not disclosing contributions his firm made to the same election campaign he was appointed to investigate.

The Law Society of B.C. has ordered a conduct review of Terrence Robertson, who stepped down as special prosecutor investigating Kash Heed's campaign after it was revealed his firm had donated $1,000 to the election run.

The society said in a press release Tuesday that it had determined Robertson "breached his ethical obligations as a lawyer" when he failed to reveal that contribution.

A date for a review of Robertson's conduct has yet to be set.

The Vancouver lawyer resigned his position as special prosecutor in May. His law firm, Harper Grey LLP, is a regular contributor to the BC Liberal Party, donating $8,500 to the party's 2009 election campaign alone. Robertson individually donated $1,000 to the party in 2009.

After the donations were revealed, Harper Grey released a statement saying that the firm will no longer make any political donations.

Prior to his resignation, Robertson had cleared Heed of all wrongdoing in connection to the distribution of pamphlets containing inflammatory statements about the NDP's platform during last year's election campaign.

They were deemed illegal because they didn't contain required information about who paid for them.

Under Robertson's watch, Heed's campaign manager Barinder Sall was charged with three criminal and three Election Act offences in connection to the flyers.

The campaign's financial officer Satpal Johl is facing one Election Act charge.

Vancouver lawyer Peter Wilson has been appointed as the new special prosecutor in the case.