While 40-year-old Page had small amounts of alcohol in his system, it was difficult to determine whether he had been drinking beforehand, said the toxicology report released by the Milwaukee County medical examiner's office.
"It is impossible to tell if the ethyl alcohol level is due to alcohol ingestion, or a product of decomposition," the Milwaukee-Wisconsin Journal Sentinel said, citing the autopsy report.
The Federal Bureau of Investigation (FBI), which concluded its probe into the Wisconsin gurdwara massacre, said Page had acted alone and there was no evidence that the attack was part of any ongoing threat to the Sikh community.
Page had opened indiscriminate fire just as members of the Sikh community were preparing for Sunday prayers at the gurdwara. He had also fired at two police officers before turning the gun on himself.
The autopsy report said Page had a number of white supremacist tattoos on both arms and lower legs.
A full list of tattoos was released by the Milwaukee County medical examiner's office.
Page had the number 88, a symbol of support for Hitler, inked on his shoulder. On his right arm, he had the number 38 traditionally supporting white supremacist group Hammerskin Nation. He had a tattoo of a Celtic cross on his back, a symbol often used by neo-Nazi groups. On his chest, there was a tattoo of the word "Pride".