A Lower Gwynedd man has been given three to six years in prison, followed by seven years probation, for driving drunk in a crash that killed a friend who was riding with him. 23-year-old Matthew Lynch was found guilty of homicide by vehicle while driving under the influence and other offenses earlier this year. Court documents say he was going nearly 100 miles per hour with a blood alcohol level more than twice the legal limit when he crashed his car on Swedesford Road in Upper Gwynedd. 20-year-old front seat passenger Isaiah Washington of Philadelphia was killed in the early-morning crash in January of last year. A crash reconstruction expert found that Lynch’s Honda Civic left the road and became airborne on Swedesford Road near North Penn Oak Drive, struck an embankment, flipped over and hit a tree. Lynch and a back-seat passenger, 23-year-old Tyriece Smith of Philadelphia, were seriously injured. The three men had been drinking at a Blue Bell area bar prior to the crash.