Gable Tostee can be heard breathing heavily after New Zealander Warriena Wright disappears from his Gold Coast balcony, in the explosive audio recording played in court today.
He can also be heard attempting to make a phone call that goes unanswered.
He then apparently leaves the apartment building and calls his father, Gray, to come and pick him up.
"Hello Dad, I might have a bit of a situation," he says.
After explaining what happened, he goes on, "She kept beating me up and whatever and, um, I locked her out on the balcony and I think she might have jumped off.
The jury in the murder trial earlier heard the last chilling moments of Wright's life, as the accused killer allegedly locked her on his balcony after she was growing increasingly aggressive.
"No, no, no, no, no. I want to go home. Just let me go home," she is heard saying on the audio.
"I would, but you've been a bad girl," he replies.
Wright's screams pierced the courtroom, as she appeared to be begging for her life.
Tostee can be heard asking a slurring Wright to leave his apartment, in an increasingly threatening tone.
"You goddamn psycho b****. I'm going to let you go, I'm going to walk you out of this apartment, just the way you are," he says.
"I've met some weird people on Tinder," the 30-year-old murder accused was heard to say, as the drunk Ms Wright apparently swings in and out of violent episodes towards him.
The trial, before Justice John Byrne, is continuing.