Cory Monteith's mother Ann McGregor is speaking publicly for the first time since the untimely death of her late son.
McGregor, 63, sat down for an interview with ABC News’ Bianna Golodryga, which aired on Good Morning America on Thursday morning, June 17. The chat was filmed earlier this week in McGregor's hometown of Vancouver, British Columbia.
"The loss is horrendous," McGregor said of her son's death. "Until three days ago I couldn't look at a picture of Cory… So there's been progress."
The emotional sit-down took place in recognition of the one-year anniversary of Monteith's death. He passed away on July 13, 2013 at the age of 31 in Vancouver.
An autopsy at the time ruled that the Glee star's cause of death was a "mixed drug toxicity," which included heroin and alcohol. McGregor spoke about Monteith's struggle with addiction during the interview.
"[When] Cory was 15, he did a code blue, and I think that was the turning point," she explained about an earlier overdose. "He had a lot of emotional things he was trying to figure out—lot of it was he really wanted a relationship with his father. I think when a child gets invalidated they keep reaching even harder. They want to find out why." Monteith voluntarily entered himself into rehab in March 2013 for substance addiction.
Monteith's father Joe Monteith is divorced from McGregor and became estranged from the family. He was not invited to attend the late actor's funeral.
While his father was no longer a part of his life, Monteith's former girlfriend Lea Michele is still in contact with McGregor. She said she speaks to the actress over text messages and emails, and added, "She's hurting too… you see the sadness. I know her pain."
McGregor added that no one in the star's life was able to help him. "I don't think we have power to change the choices they're making," she said. "I think with the kind of connection Cory and I had, if we couldn't prevent that situation, I don’t have the answer."
Watch McGregor's interview in the video above.