Victorian Liberal MP Matthew Guy is demanding an apology from his colleague Moira Deeming after police closed their investigation into an allegation he assaulted her, finding there was “no offence detected”.

A visibly emotional Guy addressed reporters outside state parliament on Friday morning, calling on Deeming, as well as the premier, Jacinta Allan, and the attorney general, Sonya Kilkenny, to apologise.

“My family name, my reputation is not a political toy. No one’s is. So I want – and my family deserve – those apologies, particularly from Moira Deeming,” he said.

“There was no ambiguity. I did not do what was alleged, the CCTV proves this. It did from the start, and Victoria police agree.”

Deeming had reported to police on 16 June that Guy, the opposition’s public transport spokesperson, had assaulted her at a Macedonian community event in Sunshine on 23 May.

It is understood Deeming had alleged Guy had placed her in a form of headlock. She has been approached for comment.

CCTV footage of the event was circulated on Thursday, with police that evening confirming they had concluded their investigation.

“It was reported a woman was assaulted by a man at an event,” police said.

“The woman did not require medical attention, and the incident was reported to police on 16 June.

“Following a thorough investigation, it has been determined there was no offence detected.

“Investigators have engaged with the woman who made the report.”

It is understood police did not question Guy as part of their investigation.

Guy claimed “every Australian male over 40 seems to be blamed, scapegoated, not believed” and “now thrown under the bus, even by our own government”.

Kilkenny on Thursday issued a statement directed at the opposition leader, Jess Wilson, which included 10 questions she “must answer” about the allegations including whether it is “appropriate for a member of her caucus to be in the party room when they are the subject of a complaint to police”.

Allan, meanwhile, said told reporters Kilkenny’s questions “go to the heart of the leadership of the Liberal party.”

“They go to allegations of very serious matters about an alleged assault by one Liberal party member of parliament against a colleague in their party room,” she said on Thursday.

Guy claimed the premier and the attorney general’s comments “told every Victorian male over 40 they don’t have your back”.

“To Aussie males who are sick of this treatment, who are sick of not being believed, some of us in parliament still have your back. I have your back,” he said, adding he was appreciative of the support of his Coalition colleagues, friends and staff.

“My whole family has been deeply hurt by these allegations. I am owed the apologies I seek. Any reasonable and decent person would agree.”

Guy was joined by his solicitor, Candice Almeida from Queenie Thompson Laywers, who said: “My client has endured immense personal and professional harm as a consequence of those allegations. He hopes that the outcome serves as a reminder that allegations of this nature should be carefully investigated before conclusions are reached, and that every person is entitled to the presumption of innocence.”

They did not take questions.

Wilson is expected to hold a press conference in Mildura on Friday afternoon.

Speaking on ABC Radio Mildura on Friday morning, Wilson thanked police for their “prompt” investigation but said she would wait for Guy to address media before providing further comment.

“I’m pleased that the police investigation has concluded promptly, and that no offence has been detected,” Wilson said.

“I have given Matthew that opportunity this morning to respond. I’ve reached out to Moira to seek a conversation with her when she returns from overseas.”

The allegation – just five months out from the election – has heaped pressure on Wilson, who, after her appointment as leader in November, had managed to bring stability to the Liberal party, which has endured years of infighting between the moderate and more conservative groupings.

The party also faces a serious challenge from a surging One Nation, which risks its chances to form a majority government.

Wilson last week embarked on a five-week tour of each of the state’s 88 electorates, to pitch the Coalition as ready to govern.