I couldn't find the original 2013 complaint/petition for custody by JoAnns mother, but here’s the article with all of the details about it including the reference of Andrew Freund, Sr. dressing up in a Army uniform and JoAnn pulling a knife.
~snip
“In addition, the child witnessed violent acts between Cunningham and Freund. The couple had weekly arguments that turned violent and involved Freund shoving Cunningham and Cunningham punching Freund. During one fight, Cunningham pulled out a knife and threatened Freund and Freund pushed Cunningham down the stairs, according to the petition.
In other instances, Andrew Freund would dress up in an army uniform and walk around the home with a gun in his hand, according to Hughes' filings. The fights, the child said, frightened him and made him fear his mom would be seriously injured.”
~snip
Court Records Show History Of Neglect, Drugs For Freund's Parents