She was later taken into custody.
Costarakis told police that her daughter-in-law was a drunk and a bad mother to her 6-year-old granddaughter, the police report said.
Angela Costarakis told WJXT TV (http://bit.ly/19tr3XK) on Friday that she did not know why her mother-in-law would be so angry with her.
"I am beyond sad and it breaks my heart because it messes up the family," she said. "I have compassion. I don't want to see anyone spend the rest of their life in jail. However, I am still just dealing with it. I just found out. I have not wrapped my head around it."
The police report said Diana Costarakis claimed her daughter-in-law was leaving her son and moving to Denver with her granddaughter. Angela Costarakis told WJXT that wasn't true.