The Crown has closed its case against Dunedin doctor Venod Skantha, arguing a young witness backed up circumstantial evidence.
Earlier in the trial, the defence suggested the witness was involved in the murder.
The teenage witness, who cannot be identified, admitted to exaggerating and lying to police.
Crown prosecutor Robin Bates told the jury on Tuesday while the witness exaggerates, he's no criminal mastermind and would not viciously kill a friend.
"What the Crown says is that evidence that I have been through and described to you is sufficient alone to satisfy you alone beyond reasonable doubt," Bates said.
"You put all that together and you look at it [and] use your common sense, you could deal with it on that basis."
Skantha has pleaded not guilty to one count of murder and four separate counts of threatening to kill.
Bates, summarising the Crown's argument, said Skantha told the teen witness to drive to Amber-Rose's house on the night she was killed.
"The Crown says Dr Skantha then went inside and cut her throat," Bates told the court.
"He had gloves on, left marks on the wall and light switch."
The Defence case, however, is that Amber-Rose was killed by an intruder who was not Skantha. The trial continues.
