New documents show multiple people knew the killer was abusive towards his wife and one said he spoke often of disposing bodies.
A former neighbour, a Canadian Forces veteran, says she told police about the gunman’s weapons and domestic violence and nothing was done.
RCMP say they also found out where the gunman hid overnight before he started his second wave of killings.
Canada is trying to piece together exactly what happened during the country's deadliest modern-day shooting that killed at least 19 people in Nova Scotia over the weekend.
Several of the victims are believed to be unaware there was an active shooting situation happening.
In 1966, student nurse Luisa Silverio arrived in Chicago from the Philippines. She'd dodge the knife of a killer within months.
Late Sunday night, two young people died and several were shot after a lone gunman opened fired into a crowded restaurant.
Several established conspiracy subcultures jumped at an opportunity to push media-discrediting agendas.
Alek Minassian has been charged with 10 murders. Before the attack began he allegedly posted his support for Incel and praised mass murderer Elliot Rodger.
Minassian, 25, has been described as intensely socially awkward and has been connected to an incredibly misogynistic online group.
Facebook has confirmed to VICE that the post linking Alek Minassian, accused of killing ten people, to the misogynistic group is real.