A man admitted he had battered a care worker to death with a fire extinguisher at a hostel in Ealing, a jury heard on Thursday (February 18).
Michael Meanza killed Jenny Foote in a "brutal and violent attack" in her office at the mental health charity-run Collette House, in Acton , Ealing, the jury was told at the Old Bailey.
Ms Foote, 38, knocked on his door after a neighbour complained about noise coming from his flat in the early hours of July 27, 2015.
Meanza then made his way downstairs three hours later before "repeatedly striking her to the head and face with a large, heavy extinguisher", jurors heard.
Fled the blood splattered office
The Old Bailey heard how the 47-year-old, who had been resident at the hostel for three months, fled the blood splattered office, leaving Ms Foote's lifeless body on the floor.
He was then arrested later that day clutching a framed photograph of his girlfriend and a radio and told police: "I know I'm guilty," jurors heard.
It is alleged he then smiled at an outreach worker who had agreed to join him in his police interview and said: "I've really blown it this time."
Meanza later told officers it was "the rage" which had caused him to do it, adding: "Three hours it's taken to brood in me. And then I went down and I blew."
He also told how he had been due to see his girlfriend of more than 20 years at a care home in Watford, but said: "(We have) always been apart.
"And that's been going on for 22 years...That would drive you bonkers...I snapped."
Previous threat to kill his psychiatrist and nurse
The court heard he had been subject to a hospital order since the 1990's, but despite threatening to kill his psychiatrist and a nurse in 2013, had been released back into the community.
His first psychiatric admission was in 1990 and he was made the subject of two hospital orders in the 1990's following criminal convictions in the courts, jurors heard.
He was released into the community in 2001, but briefly recalled to hospital in 2009 and again in December 2013 after threatening to kill his psychiatrist and a psychiatric nurse.
Meanza was released in April last year after a mental health tribunal panel deemed him well enough to be conditionally discharged, jurors heard.
Prosecutor Brian O'Neill QC said Meanza was prone to violent outbursts triggered by troubles in his relationship, as well as being asked to lower the noise from his television or radio, especially late at night.
He said: "Tragically for Jenny Foote those two flashpoints ignited that night resulting in an explosion of anger from Mr Meanza against the system which had kept him locked up for so many years and it was against Jenny Foote that he directed that anger as he brutally beat her to death."
Manslaughter claim
Meanza admits killing Ms Foote, but claims he is only guilty of manslaughter because he was suffering from "severe anger pathology" at the time.
But Mr O'Neill said prosecutors do not accept he should be able to escape his legal responsibility "on the basis he is too angry an individual to be guilty of murder."
He explained that although Meanza was suffering from paranoid schizophrenia and a personality disorder, there is no evidence he was suffering from psychosis at the time.
Meanza, of no fixed address, denies murdering Ms Foote.
The trial continues.
