Conversation so far:
When did Lisa Marie Presley join scientology?
Lisa Marie Presley was brought into the Church of Scientology in 1977 by her mother, Priscilla.
Was Lisa Marie Presley's family into Scientology?
Lisa Marie Presley was brought into the Church of Scientology in 1977 by her mother, Priscilla.
What Scientology causes did Lisa Marie Presley work for?
In October 1997, Lisa Marie Presley and Isaac Hayes opened the Literacy, Education and Ability Program. LEAP is run by Applied Scholastics, a group run by Scientologists.
Did Lisa Marie Presley get any awards for her charitable work with the Church of Scientology?
On January 5, 2002, Lisa Marie Presley received the Humanitarian Award from the Church of Scientology-supported World Literacy Crusade.
What kind of award is the Church of Scientology-supported World Literacy Crusade award?
Lisa Marie Presley received the Humanitarian Award from the Church of Scientology-supported World Literacy Crusade for her efforts to help American children learn study skills and improve their lives.
Did Lisa Marie Presley use her star power for other causes?
On September 26, 2002. Lisa Marie Presley addressed a Congressional hearing in opposition to the use of medication in treating ADHD in children.
What else did Lisa Marie Presley do regarding the use of medication in treating ADHD in children besides speaking  at a congressional hearing?
Lisa Marie Presley also addressed the Scientology Committee as the International Spokesperson for Children's Rights, for the Citizens Commission on Human Rights (CCHR), a group run by Scientologists.

Question: Why did she speak out about this?
Self-contained rewrite: Why did Lisa Marie Presley speak about the use of medication in treating ADHD in children?