An African-American singer who was attacked at a California music festival after dedicating a song to Trayvon Martin has filed a lawsuit against the white woman who beat him.

Dinalynn Andrews-Potter, 43, was charged with assault and elder abuse after she charged at singer Lester Chambers and assaulted him for dedicating a song to Trayvon Martin. Chambers was taken to the hospital after the assault and treated for bruising and nerve damage.

The woman reportedly yelled, “It’s all your fault, you caused this s—,” before shoving Chambers to the ground. A police report noted that Andrews-Potter suffers from PTSD, which “by her own admission, causes her to easily snap, especially when people keep repeating the same thing over and over again.”

Chambers, 73, had urged prosecutors to charge Andrews-Potter with a hate crime for assaulting him while performing what he described as a peaceful and spiritual song.

In Chambers’ lawsuit, he calls the attack “a racially motivated public attack,” noting that Andrews-Potters was yelling racial slurs during the attack. The suit accuses both Andrews-Potter and the city which sponsored the blues festival of battery, elder abuse, and interfering with Chambers’ civil rights.

The assault took place on the same day that George Zimmerman was acquitted in the k!lling of unarmed teen Trayvon Martin.

“This was an egregious attack upon an 73-year-old African American blues legend that took place moments after Mr. Chambers had dedicated a song about Martin Luther King … to the family of Trayvon Martin,” said Chambers’ attorney in an email. “This has all the appearance of a hate crime.”