Brooks was convicted of two counts of attempted murder, one of attempted arson with intent to endanger life and one count of possession of a bladed article.
He is due to be sentenced on 3 June.
It can now be reported that Brooks was “voluntarily absent” from the trial, because he was on hunger strike.
He also sacked his lawyers before the trial and was unrepresented in the case.
Judge Edward Pepperall, addressing the jury, said: “You have listened very carefully to this evidence – you have scrutinised it with care, and you have not thought for one moment that because Dr Brooks was not here he was guilty.
“That was the right approach, and I thank you for it.”
The judge also read out in open court a ruling he had made on Wednesday, when he detailed the background to the case and Brooks’s efforts “to disrupt and manipulate rather than to participate in his trial”.
He said the jury was “entitled” to hear it from him, rather than read it in the media once reporting restrictions were lifted, and noted the absence of a defendant and lawyers on his behalf “probably added to the weight” of their duties.
Adjourning the case for sentencing, the judge said he would also write to the governor of HMP Norwich to request that Brooks attends his sentencing in person.
“In view of Dr Brooks’s track record, there is every reason to think he will not attend his hearing voluntarily,” he said.
When opening the prosecution’s case, Tracy Ayling KC had told the jury it was “clear that the defendant hated Graeme Perks” and wanted him “out of the way”.
Nottingham University Hospitals NHS Trust said Brooks, who specialised in burns and plastics, was first suspended in 2014, but his contract was terminated in January 2021, and during that time there were some periods when the suspension was removed but Brooks was not on active duty as a doctor.
Mr Perks – a consultant plastic surgeon who had recently retired – was woken by the defendant breaking in through the conservatory and was stabbed in the abdomen after he initially mistook the defendant for his son.
The victim’s wife Beverley and son Henry raised the alarm after being woken, and Mr Perks was transferred to hospital where he underwent surgery and was not discharged for more than a month.
Mr Perks had a “95% chance of dying”, and only survived because of “quick action and amazing surgical skill”, the court heard.
Giving evidence at the trial, Mr Perks said: “My recollection is that all I felt was guts sticking out.
“Sadly I’m experienced enough to recognise that it was intestine.”
Nottinghamshire Police said Brooks was linked to the scene by a blood deposit in the conservatory, and on a crowbar he had used to force entry.
His blood was also found on the handle of the knife used in the attack.
Detectives also used CCTV footage to track Brooks’s movements.
Inside his garage, they also found his blood, a container of petrol in his bicycle pannier, matches and a lighter.
