A Florida man was arrested last week after police said he attacked a woman and said he was "her grandmother" before blaming the encounter on his alternate personality named "Joker."

Otis Wayne Pierson, 37, was found by a woman trying to hide behind a dryer in a Fort Walton Beach-area building last Thursday and pounced on her, the Northwest Florida Daily News reports. Pierson began to hit her and also placed his hands around her throat and began to squeeze, police said.

He eventually let go, but police said he told her that he was "there to save her" and "he was her grandmother." Police said the woman ran away and Pierson began to walk down the street, smoking a cigarette.

The woman told police that she had never seen Pierson before and he told officers that his alternate personality, "Joker," is "a bad man" and "he doesn’t remember what Joker did." Police said Pierson admitted to knowing the woman from a recent sexual encounter.

The woman had injuries to her nose and mouth along with bruises on her eye and throat while Pierson had a single scratch under his left eye. He was arrested and charged with felony battery with a prior conviction.

Read more at the Northwest Florida Daily News.