A homeless Columbia man was arrested early Monday morning after beating a man.
Police said at about 1:15 a.m. Sunday they were called to 28 North Ninth St. for an assault.
They said Thomas Carter Jr. was trying to fight a man for insulting his girlfriend.
The man pulled out a knife and Carter took a skateboard and hit the man several times in the head and face.
Carter was arrested for armed criminal action and first-degree assault.
The victim was taken to a hospital by ambulance in serious condition.