In some ways, what happened to Lucas takes more adjusting to than the loss of a life. The constant reminders and struggles just to get through the day always take their toll on the entire family and close friends. Each and every one's life is totally different from this day forth and not easy to come to terms with. I wish all the Dumbrell's and their close friends all the strength and guidance they need to move forward from here and sincerely hope they find the way to get on with their lives while helping Lucas have the best life possible.
Very sad news, but hopefully things will get a bit better. It takes 12-18 months to see what the permanent injuries are, and most quadriplegics regain some use of their arms which obviously helps with regaining some independence (I work in this area so I have seen the longer term outcomes). If you have ever seen wheelchair rugby, all of the players are quadriplegics, but they use manual wheelchairs which they can push and control with their arms well enough to play a very fast sport. Watch the movie "Murderball" - it's entertaining and inspiring! I know some quads who have also regained some use of their legs. It's a complex injury with many different outcomes over time.
All the best Lucas and family - things may seem bad now, but it gets better!