The officer who shot and killed 40 year old Corey Peeace inside a southeast Calgary home on Friday night had previous experience with him, police confirm.

Police held a news conference on Sunday after the Peeace family went public with the news that a lawsuit had been filed against the Calgary Police Service in connection with a Tasering incident involving Peeace in February 2010.

"One officer was forced to deploy his Taser. That officer is the same officer that discharged his firearm Friday night," said Chief Rick Hanson.

However, they add that this had no influence on the officer's actions on that fateful night.

They claim that no lawsuit had been served from him or any member of his family.

They do, however, confirm the incident occurred.

Peeace's family still don't know why Corey was shot.

They agree with police that he was holding a knife, but wasn't threatening anyone.

They wonder why such deadly force was necessary.

Chief Rick Hanson personally reviewed the 911 tape and says he heard threats in the background over the phone. "A male in the house is heard saying and I quote here ‘you are going to die today' unquote."

Neighbours say that there was a long history with police and the Peeace family – officers had visited the Erin Woods home multiple times.

The Peeace family says that there were 11 people at home at the time of the shooting, including a toddler.

They believe a stray bullet could have hit any of them. "Seeing someone you love shot by someone you think will protect the community just isn't right," said Corey's niece Cheyenne.

John Dooks, head of the Calgary Police Association, says that the officer did exactly as he was trained in the split second situation. "In this situation here, the family members are the victims. The officer did what I expect and what the public expects and that's to stop the threat."

The man's family, however, insists he was no threat.

They're now left with preparations to bury him.

The Alberta Serious Incident Response Team continues to investigate the shooting.

They look into all officer-related shootings and will determine if the officer used too much force.