Charlene Sumlin wrote Sunday on Twitter the family intends to pursue charges if police can identify the letter’s author. The person referred to Kevin Sumlin by the N-word in the letter.

“I literally cannot wait to look at this person eye to eye. There is a real unique kind of cowardice in someone to anonymously criticize, ridicule or even threaten another person. If I have the opportunity to expose even ONE troll, I am going to do it,” Mrs. Sumlin wrote.

MORE: Sumlin’s wife posts racist letter online

Kevin Sumlin was roundly criticized after the Aggies blew a 34-point lead and lost 45-44 to UCLA in Week 1. One Texas A&M regent called for Sumlin’s dismissal. The racist letter was sent not long after.

Sumlin told reporters Saturday after the Aggies’ 24-14 victory over FCS school Nicholls State that the letter crossed a line because it brought his family into the situation.