Dawson College shooting survivor turned police officer reflects on friend's death 20 years on

<img src='https://i.cbc.ca/ais/b5b99622-2deb-48e0-91d5-19ad2ad85b82,1789236732532/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C69%2C5712%2C3213%29%3B' alt='A photo of a teenager wearing a graduation cap and holding her degree is in a frame on a table outdoors. There is a vase with roses and a glass butterfly beside the photo.' width='620' height='349' title='It’s been 20 years since the Dawson College shooting in Montreal when a gunman entered school grounds, killing student Anastasi De Sousa and injuring 19 others. De Sousa was being remembered at a ceremony at the school on Sept. 11.'/><p></p>