She said her son told her that police used a Taser on him and put guns to their heads, but she said she hasn't been able to get all the details because he is never alone.
In a statement issued earlier this month, she said her son "is managing very well despite the very basic conditions."
"This has been an exhausting and traumatic ordeal for our entire family, she said. "Grant is my oldest child, and he is missed beyond belief. It saddens me that in the 21st century, a few mindless police officers used barbaric abuse when arresting my son."