she tells our joslyn moran, youth and adults alike need to be a part of this conversation. >> this is one of collins's las school pictures , when he was 16. >> reporter: liz walker lost he son to an accidental fentanyl overdose in august of 2021. he had just started his senior year at claremont high school, in belmont. >> and then, this is what we sent out to everyone, after, an i just think, that smile is what so many people remember . the kid just came out smiling, and , except for the last year and one half of his life. >> reporter: liz says the pandemic took a toll on him. he was dealing with anxiety, and h was depressed. liz and her husband only knew he had been smoking weed. they did not thin he had been experiment with other drugs. >> he became addicted, and on august 29th, 2021, we found him -- my husband found him, facedown in his room, and he ha taken a small amount of cocaine, that was largely fentanyl , and he was gone. >> reporter: now, liz is workin to spread as much awareness as you can so that no one else has to go through the pain she felt she also want people to unde