The mother of a girl killed in the Sandy Hook school shooting has released a special video, remembering her daughter on the anniversary of her death. 

Six year old Ana Marquez-Greene was one of the 20 children as well as six staff members slain by a gunman, inside the elementary school on Dec. 14, 2012. The gunman later took his own life. 

Ana's older brother, Isaiah, was also in the school at the time of the shooting, but made it out safely. 

The Márquez-Greene family lived in Winnipeg for three years before moving to Newtown in July 2012.

A month after the shooting some parents started Sandy Hook Promise, a group calling for a national conversation to help prevent such tragedies in the future. The group also focuses on gun safety and mental health awareness.

Nelba Marquez-Greene, Ana's mother, released a video on YouTube as part of the message the group is trying to spread, and remembering her daughter.