10/22/2014 06:02 EDT | Updated 10/23/2014 08:59 EDT

Heartbreaking Photo Shows Nathan Cirillo Moments Before Shooting

Just minutes before being gunned down Wednesday morning, Cpl. Nathan Cirillo stood stoically in front of the National War Memorial.

The moment was captured by a young man from Winnipeg on a tour of the monument who posted the photo to Twitter.

The caption reads: "Ok so we were on a tour at that war monument in Ottawa a few minutes ago, a few seconds later there was a shooting.."

The photo was taken at 9:41 a.m., HuffPost Canada was told by the poster. Just 12 minutes later, at 9:53 am, journalist Peter Henderson sent out what is thought to be the first tweet about the shooting.

Cpl. Cirillo, a Hamilton-based reservist with the Argyll and Sutherland Highlanders, was father to a young son.

His Instagram profile shows off his love of dogs, and particularly German shepherds.

On Sunday, Cirillo posed for another heart-wrenching photo in front of memorial.

Cirillo and his family are in the thoughts of all Canadians today.

Related on HuffPost:

Photo gallery In Photos: Ottawa Shooting See Gallery