Nick Carter says "my heart is broken" after brother Aaron Carter's death

Nick Carter, of the 90s pop music group Backstreet Boys, spoke publicly about the death of his younger brother, Aaron Carter, for the first time on Sunday.

Captioning an Instagram post with photographs that appear to show the siblings together as children and adolescents, Nick Carter said that his "heart is broken" and cited his brother's struggles with mental illness and addiction, which Aaron Carter discussed openly during his life, as "the real villain here."

"Even though my brother and I have had a complicated relationship, my love for him has never ever faded," he wrote. "I have always held on to the hope that he would somehow, someday want to walk a healthy path and eventually find the help that he so desperately needed."