On Thursday investigators released an image of Mr Gallagher in an appeal to the public, and he was arrested on Monday morning at Central Station where he was sleeping rough. He has been charged with stalking, entering enclosed lands without permission and common assault. Court documents seen by Fairfax Media show that Mr Gallagher had been stalking the New Zealand national for months "with the intention of causing her physical or mental harm". Appearing on audio-visual link at Central Local Court on Monday afternoon, Mr Gallagher was "aggressive, highly agitated and abusive" according to court documents, and "unable to indicate to the court what he wants". Mr Gallagher is now under assessment under the Mental Health Act, and will return to court at a later date.

One day prior to the alleged assault, Mr Gallagher had been arrested at Sutherland Railway Station. Police facts say that Mr Gallagher was captured on CCTV kicking a woman's suitcase, punching a man in the chest and lashing out at cars. ABC Headquarters in Ultimo where the alleged attack took place. Credit:Peter Braig He was arrested and charged with conducting himself in an offensive manner, and was later charged with intentionally damaging the floor at the Sutherland Police Station. An all-staff memo at the public broadcaster issued on Monday told staff to not allow tailgaters through the security gates and to report all security risks to staff.

"Following this incident, we have increased security guards at Ultimo. There may be increased checks on IDs, security attention at all building entry points and escalated physical security improvement works," said the memo. In a statement, a spokesman for ABC said security of staff was of paramount importance. "There was a security incident at the ABC Ultimo Centre last week. A man has been arrested and the matter is now before the court," the spokesmand said. "All affected employees are receiving support and have asked for privacy. "The security and safety of our employees is of paramount importance and the ABC is reviewing the incident."

Staff members have previously expressed concerns over the effectiveness of ABC security. One radio presenter, who did not wish to be identified, said they always have their phone out while walking into work – especially when debate over alleged bias has been making headlines. Former triple J announcer Helen Razer has previously written about the physical and emotional toll of being stalked while working for the public broadcaster. Earlier this year, in the wake of the alleged rape and murder of Melbourne comedian Eurydice Dixon, Ms Fricker made a passionate speech on-air about women's right to feel safe. "I’ve seen people absolutely shattered by what has happened here, because she could have been any of us," she said. "It’s infuriating to be told, ‘Oh, you need to look out for yourself better and you need to be more aware of the dangers’, when I think that women are so, so aware of the dangers.

“If you are a man and you see your friends making someone feel uncomfortable, if you see them making a remark to a woman or you see your mates on social media attack a woman or say something nasty about her: call them out.”