E! News reports that ,according to his death certificate, the 91-year-old passed away after going into cardiac arrest and suffering from respiratory failure.
The certificate also notes that Hefner suffered from a recent bout of E. coli and Septicemia (a severe blood infection), listing them as contributing factors to his declining health and eventual passing. We've learned the E. coli was highly resistant to antibiotics.
The certificate also states that Hefner passed away 5:06 p.m. on Sept. 27, and he was still married to Crystal Hefner at the time of this passing.
