Here's what the article actually said:
The incident occurred Saturday evening at an outdoor barbecue on the university's South campus to celebrate a student's birthday. About 30 people were present at the time of the stabbing, including five or six football players, the friend said.
The friend said no argument preceded the stabbing, and that it occurred about 2 minutes after Howard showed up.
"Everybody was out there chilling," the friend said. "No one was drunk.
"It literally just happened out of nowhere," the friend said. "It came out of nowhere. There was no argument before. It just happened."
Where's the intent you're interpreting? I'm not sure what you're questioning vis a vis my interpretation, when I asked if he might be mentally ill to show up at an otherwise peaceful, not out of control BBQ, no argument ensued, and then begin stabbing.