Police arrested a 34-year-old Pearl City man today for allegedly head-butting a woman, also 34, in the face.
Police said the assault occurred 9:44 p.m. Feb. 7 in Honolulu.
The man and woman, who live together, got into an argument. The man then allegedly head-butted the woman in the face and caused substantial injury.
Police arrested the man Tuesday on suspicion of second-degree assault.