The gunmens name , race and photo would be nice.
It’s amazing not one news outlet is providing it.
I bet its an “asylum seeker”!
They have said the gunman is in custody and was injured. The media have shown a film clip of two police officers escorting a heavy-set white guy in handcuffs who was limping noticeably and had blood on his leg. It's probably a safe bet that that was him. So two thirds of your question has been answered.