Ray, if the front end collapsed or the accident is the result from some mechanical defect, make sure you get as much documentation as you can regarding the accident. You will want as many pictures as you can of the scene (even if the bikes have been removed) and the motorcycle itself.
Get far, medium and close up shots of the scene and the bike damage. Make notes now of everything that you witnessed before, during and after the accident. If possible, get some measurements at the scene (point of impact, gouge marks in pavement, etc.) Also, pics of your brother to show the extent of his injuries.
This info is important in the event you foresee any civil action down the road, often which can be years after the fact.