I would have a better atittude toward forgivness knowing it was an accident insted of intentional,I have also heard that it was a close friends of Billy's who died, so that must weigh heavily on his heart too, combined with incarceration I would say his debt is being paid for the rest of his life behind or out side of those prison walls.
Billy did not run,hide or deny the facts surrounding those unfortunate cicumstances, he took responsibility and did not cower away from it unlike a majority of those in this world who shirk away from any wrong doing, he will be released one day soon and when he does he will be right back to Designing,Fabricating and building bikes.
Sometimes God has to seperate those he needs to work on, so lets hope that God has opened his eyes and can use him and the situation to help others avoid some costly mistakes in life.