Some will see his death as "a happy ending to this story, and a quick ending and justifiable," Weintraub said. "But we're in a civilized society and no one should really be celebrating this."
No place in the world
In handing down a sentence last month, Judge Michael Russo told the kidnapper there was no place in the world for his brand of criminal.
Castro pleaded guilty to 937 counts, including murder and kidnapping, in exchange for the death penalty being taken off the table.
The charges stem from his kidnapping, rape and assault of Knight, abducted in 2002; DeJesus, abducted in 2004; and Berry; abducted in 2003.
Castro is the father of Berry's 6-year-old daughter.
All three women kept diaries with Castro's permission, providing many of the details of their abuse.
"I cried every night. I was so alone. I worried what would happen to me and the other girls every day," Knight, 32, said, as she addressed her abductor head-on during his sentencing. "I will live on. You will die a little every day."