The Melbourne man who raped and murdered aspiring comedian Eurydice Dixon later said the attack "didn't turn out exactly as he had planned".
Jaymes Todd, of Broadmeadows, was 19 when he spotted Ms Dixon at Flinders Street Station as she walked home after performing a comedy gig.
He stalked the 22-year-old for an hour over five kilometres, before attacking her as she walked through Carlton North's Princes Park on June 12 last year.
A passer-by walking home from work discovered her body at 2.50am the following morning.
The Supreme Court of Victoria heard Todd had an obsession with rape porn, strangulation porn and “emo girls” prior to the murder and fantasised about violent non-consensual sex culminating in a woman's death.
He has since been diagnosed with sexual sadism disorder.
During the second day of a pre-sentence hearing on Friday, two psychologists agreed that this disorder motivated the attack, rather than pre-diagnosed autism.
They differed, however, on whether he intended to murder Ms Dixon while carrying out his "fantasy".
Forensic psychiatrist David Thomas told the court Todd told him he wasn't sure if he would "go the whole way" until the attack had started.
"Just to be clear 'going the whole way' was completing the fantasy - the rape and strangulation?" defence lawyer Tim Marsh asked.
"Yes," Dr Thomas replied.
Forensicare psychologist James Ogloff said the then-teen saw Ms Dixon's death as "probably inevitable".
"He is someone who has watched videos of these things. He had a degree of understanding of how much force could hurt someone," he said.
"He knew he was doing incredible harm to this woman and he did not stop - if anything it aroused him."
The two psychologists also disagreed on Todd's level of remorse.
Professor Ogloff described Todd's actions after the murder - including buying a pie and coffee, revisiting the crime scene and searching the internet for rape porn and stories about Ms Dixon - as "profoundly disturbing" though not uncommon for people with autism.
Todd told Prof Ogloff he "felt nothing" and "didn’t really have any feelings".
He was "glad he was caught" as the attack "didn't turn out exactly as he had planned".
Dr Thomas said Todd began to understand the damage caused to Ms Dixon's family and friends once in custody.
On Thursday, he cried as Ms Dixon's sister read a statement to the court.
Todd handed himself in to police when friends told him his face was "all over the news", although he initially denied being Ms Dixon’s killer.
He later admitted “I did it”, officially pleading guilty to murder, rape, attempted rape and sexual assault in November.
The hearing continues before Justice Stephen Kaye.
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