Police say 22-year-old Sean Owen O'Neill Jr. of Glen Mills was arrested early Thursday on suspicion of drunken driving.
The arrest is the latest in the family's string of legal problems.
O'Neill served time as a juvenile for the 2006 shooting at a party at his home. His sister, Roison O'Neill, is in prison for a fatal 2008 drunk-driving accident.
And their father, pub owner Sean O'Neill Sr., was recently deported to Ireland after serving time on a federal gun charge.
West Goshen Township police say they released Sean O'Neill Jr. after Thursday's crash to await a summons. He does not have a listed phone number.
