Victoria Police concluded its investigation into assault allegations made by Liberal MP Moira Deeming against former opposition leader Matthew Guy on 26 June 2026, finding he had committed no offence, after footage of the incident surfaced, according to Herald Sun.

Deeming had alleged Guy placed her in a headlock at a community event, a claim Guy flatly denied. Police confirmed they were investigating the matter following the complaint, per The Guardian and ABC News. With footage of the incident now in hand, police moved quickly to a determination. No charges were laid.

Guy had also been considering legal action against Deeming in response to the allegations, a posture he signalled publicly even while the police review was still active. Whether that prospect changes now that the investigation has closed in his favour is not yet clear.

The episode is one more chapter in a protracted and acrimonious relationship between the two figures within Victoria's Liberal Party. Deeming, who holds socially conservative positions that have repeatedly put her at odds with successive party leaderships, was expelled from the Liberal parliamentary party room by Guy in 2023 over her attendance at a rally that drew neo-Nazi demonstrators — a decision she contested and which eventually led to her reinstatement. Guy himself stepped down as opposition leader after the 2022 state election defeat and has remained a significant if contested figure within the party's internal politics since.

A formal assault complaint between sitting parliamentarians of the same party is unusual by any measure. The fact that it reached Victoria Police rather than being handled through internal party mechanisms speaks to the depth of the personal breakdown between the two. The emergence of footage as the decisive evidentiary factor is also notable — without it, the competing accounts would likely have produced an inconclusive investigation rather than a clean finding.

For Guy, the no-offence determination closes the most acute legal exposure. The reputational dimension is harder to quantify. Allegations of physical conduct between colleagues, once public, carry a persistent charge regardless of outcome. His stated consideration of legal action gives him a further instrument, though defamation claims in this context carry their own procedural and political costs.

For Deeming, the result puts the complaint on record as unsubstantiated. Within a party already fractured along factional lines, that outcome will be used by her opponents. Whether it affects her broader standing with her electorate — she holds the Western Metropolitan Region upper house seat — depends largely on how the story is processed by the communities whose support she has cultivated through her advocacy on gender and parental rights issues, constituencies not easily moved by intra-party disputes.

The Victorian Liberals head into the next state election cycle carrying wounds that are structural as much as personal. The Deeming–Guy dynamic is a symptom of a deeper tension between the party's moderate and conservative wings that has defied resolution across multiple leadership tenures. This latest episode will not simplify that equation.