Grey began a relationship with Green Party MP Ian Ewen-Street, a member of the select committee, who at that time was separated from his wife.
[9] Both Grey and Ewen-Street were obliged to step down from the investigation; ACT leader Richard Prebble claimed that by having an affair they had "made a mockery of the enquiry".
[13] The Brook Waimārama Sanctuary near Nelson had planned three aerial drops of 26.5 tonnes of brodifacoum-laced bait from July to October 2017 to eliminate all rodents within its predator-proof fence.
[16] That same day, a hole was drilled in a fuel tank for helicopters performing the drop, several protesters attempted to block access, and three were arrested.
[15][23] After attempting to recover some of the $100,000 it had spent responding to the BVCG's legal action, the Nelson City Council applied in 2020 for the group to be liquidated.
[28] On 14 September she won a temporary injunction to stop the drop, but lost the case, with the court stating "We are not persuaded that there is likely to be serious harm to the environment if the proposed application proceeds.
[27] They were ordered by the court to pay over $40,000 in legal fees, a portion of the costs incurred by the Council and DOC, and an additional $5000 to each of them for the withdrawn application.
[32] Grey represented Renton, who had initially pleaded guilty in November 2018 on charges of cultivating, possessing, processing and supplying cannabis.
[33] Grey continued to represent "green fairies" – people growing medicinal cannabis for themselves or their friends and family – and many of her clients were discharged without conviction.
[35] She maintains that telecommunications companies are responsible for releasing radiation into the community without adequate consultation, and encouraged people to petition their local MPs and councils.
[38] She has criticised the government response to the COVID-19 pandemic, claiming that New Zealand's work eliminating community transmission of the virus for over a year was "over-vigorous", "increasingly draconian", and "out of control".
[39][40] She did not observe some lockdown rules, going paddle-boarding during alert level 4, saying "let's break out of the fear and cotton wool mentality where we are locked inside buildings like frightened mice.
[45][46] Grey spread COVID-related disinformation on social media which triggered complaints to the New Zealand Law Society and a series of bans from Facebook.
[53] In October 2021, about 100 lockdown protestors in 50 vehicles calling themselves the "Sovereign Hīkoi of Truth" attempted to breach Auckland's border restrictions en route to Waitangi, where they were to be addressed by Sue Grey.
"[54] At the time, Grey was representing four Christchurch airport security officers in the High Court, who had lost their jobs after refusing the vaccination mandated for border workers.
"[55] Grey lost the case, with the court rejecting her argument that the order was unlawful, and reiterating that the vaccine was safe and effective and the rights of the workers was not being infringed.
"[31]In late November 2022, Grey represented two parents who objected to the use of blood from COVID-19 vaccinated people in their infant son's ("Baby W") heart surgery.
[58][59] In two radio interviews about the case, Grey falsely claimed blood from vaccinated donors contained "inflammatory factors" and was unsafe.
[60] A group called "Liveblood" stated in response to the ruling that they were "working tirelessly" for New Zealanders to have the "safest, freshest, best directed donor blood".
[65] After the parents obstructed medical personnel trying to prepare Baby W for heart surgery, Gault issued an emergency allowing Police to use "reasonable force" to enforce the Court's ruling.
In a decision released in 2025 the New Zealand Lawyers and Conveyancers Disciplinary Tribunal found that although Grey's mistake wasn't deliberate it still amounted to unsatisfactory (but not disgraceful or dishonourable) conduct.
[71] Throughout 2020, including during the general election, Grey and her party were staunch opponents of the Government's response to the COVID-19 pandemic (see COVID-19 views above) and become part of a loose, fractious "freedom" movement which often staged protests across the country.
Grey and Outdoors Party co-leader Alan Simmons met Te Kahika and Ross in Auckland that month, but turned down another offer to cooperate.
[74] During the campaign Grey attempted to join the three main candidates onstage at a debate at the University of Waikato, but was prevented by security.
[85][86][43][87] The next month another complaint to the Law Society claimed she breached the Lawyers and Conveyancers Act 2008 by "promotion of misinformation as a tool for the self-promotion of her firm and political party" and bringing her profession into disrepute.
[88] In November the Law Society announced they would "investigate general concerns raised around Ms Grey's activities" rather than pursue any specific complaint.
Judge Zohrab described her behaviour as disruptive, having the effect of inciting people in the back of the court to the degree there was a “virtual riot”.