![New York Daily News on Twitter: "William “Dave” Sanders was a Columbine teacher for 24 years, including in business and science. He left behind his wife, three daughters, and 10 grandchildren. #Columbine New York Daily News on Twitter: "William “Dave” Sanders was a Columbine teacher for 24 years, including in business and science. He left behind his wife, three daughters, and 10 grandchildren. #Columbine](https://pbs.twimg.com/media/DbOfebLUMAA30kq.jpg)
New York Daily News on Twitter: "William “Dave” Sanders was a Columbine teacher for 24 years, including in business and science. He left behind his wife, three daughters, and 10 grandchildren. #Columbine
March For Our Lives- Parkland on Twitter: "William “Dave” Sanders, 47 William Sanders was a computer and business teacher at Columbine for 25 years. He also coached the girl's basketball and softball
![Louis Morales wipes a tear from his eye alongside his daughter April while viewing the Columbine high school memorial site at Clement Park near the school in Littleton, Colorado, April 22. Morales, Louis Morales wipes a tear from his eye alongside his daughter April while viewing the Columbine high school memorial site at Clement Park near the school in Littleton, Colorado, April 22. Morales,](https://c8.alamy.com/comp/2D5AKE9/louis-morales-wipes-a-tear-from-his-eye-alongside-his-daughter-april-while-viewing-the-columbine-high-school-memorial-site-at-clement-park-near-the-school-in-littleton-colorado-april-22-morales-a-retired-los-angeles-police-officer-was-friends-with-coach-william-sanders-who-was-killed-in-the-school-shooting-april-20-gccrcjpclh-2D5AKE9.jpg)
Louis Morales wipes a tear from his eye alongside his daughter April while viewing the Columbine high school memorial site at Clement Park near the school in Littleton, Colorado, April 22. Morales,
![March For Our Lives- Parkland on Twitter: "William “Dave” Sanders, 47 William Sanders was a computer and business teacher at Columbine for 25 years. He also coached the girl's basketball and softball March For Our Lives- Parkland on Twitter: "William “Dave” Sanders, 47 William Sanders was a computer and business teacher at Columbine for 25 years. He also coached the girl's basketball and softball](https://pbs.twimg.com/media/D4nvH_AXsAAr9ee.jpg)