"He was the one that was administering," Jackson said. "I think he is responsible." The singer also told ABC's Robin Roberts that Murray should not be allowed to practice medicine.
A spokeswoman for the doctor, Miranda Sevcik, told The Associated Press that Murray maintains he did not prescribe or administer anything that would have killed Jackson.
"It just didn't ring true to me. It felt like a dream," Jackson said of her brother's death. "It's still so difficult for me to believe."
Jackson's interview with ABC News will air on Wednesday, Nov. 18 at 10/9c.