The disturbing diary entries written by a young dad just days before he slaughtered his family have been revealed.
Anthony Harvey, 25, stabbed his wife Maria, 41, daughters Charlotte, three, and twins Alice and Beatrix, two, at their home in Perth, Australia on September 3, 2018.
He killed his mother-in-law Beverly Quinn, 73, the next day.
The Supreme Court of Western Australia has heard of how Harvey planned the murders and had bought weapons the week beforehand.
He also wrote in his diary about how he would get rid of his family with options including leaving, filing for divorce or “making family disappear”.
The twisted killer wrote about how he would “prep” for the murders and penned an entry about “eliminating family”.
One of the chilling entries read: “Tonight, I will kill my wife and bludgeon and smother my daughters. Then the real hunting begins … but first my loved ones”.
Another entry read: “I am no psycho, I feel too much. I always have.”
He also wrote about embracing his “darkness and animal instincts”.
Harvey contemplated his financial future after “eliminating” his family.
“I have a good job … I am not rich but far from poor,” he wrote.
“I won’t have much money when I leave.”
The day before he butchered his family, Harvey and Maria went to the bank and she signed a form allowing him to use the funds without her.
After he killed his loved ones, Harvey took £21,700 [$38,000] from their account and pawned other valuables.
The shocking details of his crimes were heard in public for the first time in court on Friday at a hearing to decide if Harvey will become the first person in Western Australia to never be released on a judge’s order.
Director of Public Prosecutions Amanda Forrester argued in the Supreme Court that he should never get out.
Harvey covered his ears as the court heard how he attacked Ms Harvey when she arrived home from work.
He hit her on the head with a metal pipe before stabbing her multiple times with a knife he bought just days beforehand.
Harvey then stabbed his three daughters to death with a smaller blade because “they were just little girls”.
Charlotte was stabbed 38 times.
Maria’s mother was hit with a pipe and then stabbed to death when she arrived at the house the next day.
Harvey places the bodies together as if they were cuddling and covered them with a duvet before placing flowers and toys around them.
Ms Quinn was found in the kitchen, and was also covered with a duvet.
The cold-blooded killer also took pictures of his victims.
“To my beautiful wife, I’m so sorry. I would give anything to undo what I’ve done,” he wrote in a note.
“I think I’ve lost my mind.
“Take care of those little girls like you always do. I love you so much.”
Harvey stayed in the house for days before going to see his parents and eventually handed himself in on September 9.
Ms Forrester argued Harvey should be “deprived of his liberty for the rest of his days”.
“I appreciate it’s a dreadful thing to contemplate, locking up a 25-year-old for the rest of his natural life,” she said.
“But when a person destroys an entire family in the way he has — in a premeditated, violent, callous way — then community interest requires that.”
His defence lawyer said Harvey was young and was remorseful for his crimes.
He will be sentenced on July 29.