THE man at the centre of a tense 12-hour standoff with police after his girlfriend plunged 26 floors to her death is today expected to be charged with murder.
Korean-born tiler June Oh Seo, 37, is due to face Hornsby Local Court on a charge of assault occasioning actual bodily harm after Hee Kyung Choi was found dead at the bottom of her Chatswood high-rise last week.
However, after investigators interviewed 90 people, including former partners of Seo, police will today charge him with murder.
They have poured over hours of CCTV footage overlooking the apartment block to piece together precisely what happened in the lead up to the 34-year-old bank worker's death.
Seo clambered onto the awning of the 26th floor of the building from which Ms Choi plummeted, after her body was discovered in the early hours of October 9.
He then proceeded to sit on the ledge crossed-legged, at times with his head in his hands, as police desperately tried to coax him down. Officers were able to eventually drag him to safety almost 12 hours later.
It is understood the pair had split two months before her death and that Seo, who is married with a young son, was trying to woo her back.
He was taken to Royal North Shore Hospital briefly following the stand-off and returned to Chatswood police station where he was charged with assault occasioning actual bodily harm.
A friend of Ms Choi, Joon, told The Daily Telegraph last week she came to Australia as an overseas student and stayed to eventually gain citizenship.
Joon said that he met her years ago through a local church but hadn't spoken to her in the past six months.
"She made a lot of friends, she knew a lot of people, she was very outgoing," he said.
A former colleague said Ms Choi "was charming, very active and always had a big smile".