Robert F. Kennedy Jr., the son of Robert F. Kennedy, has been open about his struggles with drug addiction in his youth. He wrote about his struggles with drug abuse in his book, and he has talked about it in interviews as well.
In his book, "American Values: Lessons I Learned from My Family," he discussed his past struggles with substance abuse and how it impacted his life. He stated that he used drugs including heroin during a period in his youth.
It's important to recognize that Robert F. Kennedy Jr. has since become an environmental activist and lawyer, and has spoken out about the importance of addressing addiction and substance abuse. He seems to have used his experiences to advocate for positive change.