A nurse who described himself as having "the devil in me" has been found guilty of murdering and poisoning patients at a hospital in Stockport.

Victorino Chua, 49, faces life in prison following his conviction for murdering two people and poisoning 19 others. He will be sentenced tomorrow.

Chua injected insulin into saline bags and ampoules while working on two wards at Stepping Hill Hospital in June and July 2011. The contaminated solutions were then used unwittingly by other nurses on the ward - leading to a series of insulin overdoses to mainly elderly victims.

Tracey Arden, 44, was admitted to hospital for a "mild" chest infection but was pronounced dead eight hours later (PA)

The jury found Chua guilty of murdering Tracy Arden, 44, and Alfred Weaver, 83.

Mrs Arden had been diagnosed with multiple sclerosis and cared for in a residential home. She was admited to hospital with a "mild" chest infection, but was pronounced dead eight hours later after being treated with a saline ampoule contaminated with insulin.

Chua, a father of two, stood in silence and only blinked as the foreman of the jury delivered the verdicts.

Alfred Derek Weaver, 83, was admitted to hospital with a chest infection but died after being given a contaminated saline drip (PA)

Chua was cleared of murdering Arnold Lancaster, 81, who was suffering from cancer, but was convicted of attempting to cause him grievous bodily harm with intent by poisoning.

Experts said Mr Lancaster would have died within weeks from cancer, but that insulin poisoning "hastened" his death.

After police were called in to investigate the deaths at Stepping Hill Hospital, Chua is said to have "changed tack" by sabotaging prescription charts, doubling and trebling dosages - some with potentially lethal consequences. He was arrested in January 2012.

Experts said that Arnold Lancaster would have died within weeks from cancer, but that insulin poisoning "hastened" his death (PA)

Among the evidence presented at Chua's trial was a letter he had written, found by police at his home in Stockport following his arrest, in which he claimed there was "a devil in me" and that he was going "straight to hell".

The 13-page letter, dubbed "the bitter nurse confession", details Chua's childhood and his life in the UK.

In it he notes that he got on badly with his colleagues at the hospital, describing some of them as "nasty bitch", and that he preferred night shifts.

In early 2010 he went to his local surgery complaining he could not sleep and felt paranoid. He was prescribed anti-depressants and repeated counselling sessions.

Chua confided in his letter: "They thought I'm a nice person but there a devil in me. I know if I go, I go straight to hell no question ask."

Victorino Chua's original pass certificate from the Philippines Board of Nursing. (PA)

Outside of the trial questions have been raised over Chua's qualifications as a nurse.

When detectives flew out to the Philippines and checked his original pass certificate from the Philippines Board of Nursing, it had the photo of what appeared to be another person attached, suggesting it may not even have been Chua who sat the final exam to qualify as a nurse.

Other documents relating to his qualifications contained different styles and layouts but purportedly came from the same original awarding body.

Despite this, Chua was vetted and complied with the regulations at the time he came to the UK to work as a nurse.

An undated handout photo of Chua issued by Greater Manchester Police (PA)

Jackie Smith, chief executive of the UK's Nursing and Midwifery Council (NMC), said that officials had looked back at Chua's application and he passed the requirements in place at the time.

Ms Smith said: "When he was put on our registration, he provided what was required at the time and we have not seen a document that indicates he has committed fraud, but we do understand police have got concerns about qualifications."

In 2003, when Chua was registered by NMC, he would have been required to provide copies of a certificate of training, employment history and his passport.

The rules have been made strengthened in recent years. Candidates are interviewed and must now supply original documents, rather than copies.

A police handout photo shows Chua as a graduate (PA)

If these checks are satisfied, there is a further skills test before they are put on the register.

The NMC says Chua's case is coincidental to the introduction of the more "robust" registration process for nurses coming from overseas.

Stepping Hill nurse murder case in pictures Show all 22 1 /22 Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures A treatment room where medicine was stored at Stepping Hill Hospital in Stockport. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Benzocaine with a needle mark left by nurse Victorino Chua when he injected insulin into it. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Stepping Hill Hospital PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Ben Southam, Senior Crown Prosecutor from the CPS North West Complex Casework Unit, talks to the media outside Manchester Crown Court as nurse Victorino Chua has been found guilty. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Police outside Stepping Hill hospital in Stockport as nurse Victorino Chua has been found guilty by a jury at Manchester Crown Court of murdering and poisoning hospital patients PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Undated handout photo issued by Greater Manchester Police of Victorino Chua, a nurse who has been found guilty by a jury at Manchester Crown Court of murdering and poisoning hospital patients PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Undated handout photo issued by Greater Manchester Police of Victorino Chua as a graduate. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Victorino Chua has been found guilty of murdering and poisoning hospital patients in Stepping Hill hospital. Rex features Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Victorino Chua's original pass certificate from the Philippines Board of Nursing. The certificate had the photo of what appears to be another person attached. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Victorino Chua's original pass certificate from the Philippines Board of Nursing. The certificate had the photo of what appears to be another person attached - suggesting it may not even have been Chua who sat the final exam to qualify as a nurse. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Victorino Chua's certificate from the Galang Medical Centre, which is now closed, was rated one of the worst in the Philippines. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures And these are some of his victims: Tracey Arden, 44. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Stepping Hill patient Arnold Lancaster, 71. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Victorino Chua's victim, Alfred Derek Weaver, 83. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Joseph Eric McDonald, 66, was a day patient in for intravenous antibiotics in a saline drip, but 'began to feel terrible,' and thought he passed out. He was given dextrose - he recovered. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Grant Misell, 41, might never recover from the serious brain damage he suffered at the nurse's hands, as he is no longer able to continue his previous employment as a corporate treasurer and faces a lengthy rehabilitation process. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Linda McDonagh, 60, who died poisoned by Victorino Chua in Stepping Hill Hospital in Stockport. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Antony Smith, 47, deteriorated when put on a drip and became "unresponsive and clammy" - he was found to have severely low blood sugar levels. He suffered a second episode, but recovered after dextrose. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Jack Beeley, 72, one of the victims of poisoner Victorino Chua. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Josephine Walsh, 69, one of the victims of poisoner Victorino Chua, who was treated with a contaminated flush or drip. She suffered a second episode, but recovered with the treatment of dextrose. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Mary Cartwright, 88, one of the victims of poisoner Victorino Chua, who was admitted with a high temperature, where her blood sugar level was normal until a sudden hypoglycaemic episode after being put on saline drip. PA Stepping Hill nurse murder case in pictures Stepping Hill nurse murder case in pictures Lillian Baker, 85, was was given saline drip, after which she began to feel, "hot and flushed" and frightened. Later, she was found to have "astronomically high" levels of insulin in her blood and given glucose, she recovered. PA

Chua appears to have had a poor temper and "exploded" when challenged by colleagues, patients or relatives.

Chua agreed to leave his first nursing job in Manila amid claims of receipts being stolen and patients charged for drugs they did not receive.

Later in the UK he was accused of forging a reference purportedly from the family of a person he had cared for while at a nursing home in Stockport.

Disciplinary hearings were a regular feature of Chua's career. He tried and failed to sue a care home where he had worked.

Stepping Hill Hospital (PA)

He was also taking a complaint about his GP to the medical ombudsman at the time of his arrest for murder.

The jury heard that his motives for killing patients were "unfathomable", but detectives speculated that his reasons may be hatred for those he worked with, or that he simply felt that nursing was beneath him.