Mitchell allegeldy threatened to shoot her son-in-law and became abusive, court records state.
Approximately 25 minutes later, Mitchell arrived at the North Laurel home and confronted the son-in-law, allegedly stabbing him multiple times with a letter opener, court records state.
The son-in-law was treated at Howard County General Hospital, where he received 11 staples to treat his wounds, according to court records.
Court records state Mitchell left the scene, but not before trying to take the 18-year-old with her, which her daughter stopped her from doing. She was later stopped by Howard County police near the house, court records state.