A timeline of key events in Ontario's gas plants cancellation scandal:

September 2009: Ontario Power Authority accepts TransCanada’s bid to build a 900-megawatt natural gas-fired power generation plant in Oakville.

Oct. 1, 2010: At a fundraiser for Citizens for Clean Air Oakville, high-profile environmental activist Erin Brockovich speaks against the proposed gas-fired plant.

Oct. 7, 2010: Ontario government announces the cancellation of the Oakville power plant

Sept. 28, 2011: During the provincial election campaign, Liberal candidate Charles Sousa announces plan to cancel a gas plant in the midst of construction in Mississauga. Construction continues for another two months.

Cancelled power plant in Oakville

Oct. 6, 2011: On election day, Liberals under Premier Dalton McGuinty hold on to all their seats in Mississauga-Oakville area.

July 16, 2012: Liberals announce the decision to halt construction on Mississauga plant and relocate it to Sarnia will cost $190 million.

Sept. 24, 2012: Chris Bentley, then the energy minister, announces deal with TransCanada to relocate proposed Oakville plant to Bath, Ont. Claims total cost of cancelling the plant is $40 million. That same day, Liberals release 36,000 documents on the two cancelled gas plants. McGuinty and Bentley claim that’s all the documents that exist.

Oct. 2, 2012: Opposition parties send Progressive-Conservative-introduced contempt motion against Bentley to legislative committee for public hearings.

Oct. 15, 2012: Days after 20,000 more pages of gas plants documents are released, McGuinty announces he’s resigning as premier and prorogues legislature.

Feb. 28, 2013: Newly elected Liberal leader and Premier-designate Kathleen Wynne expands mandate of justice committee investigation into cancelled gas plants.

Mar. 8, 2013: Justice Committee hearings resume into cancelled plants and contempt motion, revived by PCs.

June 7, 2013: Ontario Provincial Police launch criminal investigation into the destruction of emails related to the cancellation of the gas plants by Liberal staffers.

Oct. 8, 2013: Auditor General Bonnie Lysyk pegs cost of cancelling the Oakville gas plant at between $675 million and $815 million. Estimated total costs of cancelling both plants reaches the $1-billion mark.

David Livingston

Mar. 27, 2014: OPP allege David Livingston, McGuinty’s last chief of staff, hired a staffer’s boyfriend to wipe clean government hard drives that contained information about the gas plant scandal. Police say the hard drives will “afford evidence” of breach of trust.

Dec. 17, 2015: The OPP charge Livingston and Miller with one count each of breach of trust, misuse of a computer system to commit the offense of mischief, and mischief in relation to data. 

Sept. 11, 2017: The trial begins. Livingston and Miller both plead not guilty to the charges. 

Sept. 12, 2017: Brown accuses the Liberals of using “legislative tricks” to avoid answering questions about court proceedings related to a trial in Sudbury. He then wrongly claims the premier was involved and could face charges herself. "I hope that the premier will give us answers, maybe when she stands trial," Brown said. "That in itself is astonishing, that we've got a sitting premier, sitting in trial answering questions about these allegations of bribery, that in itself is astonishing of (how) far this government has fallen."


Sept. 13, 2017: The day after Brown’s comments, Wynne’s lawyers write a letter to Brown asking him to retract his comments or else face legal action. The letter explains that Wynne is not on trial, but is offering testimony. The letter also asks Brown for an apology.

Oct. 23, 2017: Brown calls Wynne’s legal threat “baseless” and says he plans to ignore it.

Dec. 11, 2017: Wynne files a statement of claim against Brown over his comments.

Jan. 19, 2018: Livingston is found guilty of illegally destroying documents. Miller is found not guilty.

With files from The Canadian Press