A doctor accused of failing to report serial killer Harold Shipman for giving a morphine overdose to a patient, has admitted he "had not been good enough".
Harold Shipman murdered about 250 patients with morphine
Dr Murtaza Husain Husaini, 71, told the General Medical Council hearing in Manchester that he wished he had "done better" in pursuing his concerns.
The doctor, of Sharon Avenue, Oldham, said he asked the advice of others after the death of the patient in 1995.
Shipman is thought to have killed 250 patients between 1975 and 1998.
The patient, who was identified before the Fitness to Practise panel only as Ms A, had contacted Shipman after complaining of chest pains.
The GP visited her at home and administered a "grossly excessive" 20mg quantity of morphine, the hearing was told.
It caused the 47-year-old to stop breathing and fall into a persistent vegetative state.
The dose was given to the patient, who was asthmatic, even though the drug had a side effect of inhibiting breathing.
Dr Husaini was working as the director of the intensive care unit of the Tameside General Hospital when the woman was admitted in February 1994.
She died 14 months later on 21 April 1995.
Dr Husaini and a second doctor, Geraint Ceri Stewart Brown, who was a consultant in anaesthesia and intensive care, both deny charges of serious professional misconduct.
Dr Husaini said on Tuesday: "I have discovered I had not been good enough.
"I was sad, so very sad, and I wish I had done better.
"I am absolutely clear that I acted in good faith and I talked to people who I thought would help me and I asked for their help. I now know that they did not help me.
"My hurt is that I feel as though I could have done more. When I saw the reports in the Shipman inquiry, my heart bled.
"I thought `Is that how post-mortems are carried out? Is that how inquiries are held?' I feel there were faults in the system."
"The whole system was wrong. My fault was I put my faith in the system."
The hearing continues.