Police arrest second out-of-towner in Brighton assault case

Ronald Twombly, 23, of Hingham, arrested today in connection with that beating of four BU students on Dec. 3. Sean Melanson, also 23 and also a Hingham resident, had been arrested earlier this month. Twombly faces the more serious charges, including assault with intent to murder with a dangerous weapon and assault and battery with a dangerous weapon.