Russell `` is doing everything '' to help investigators , lawyer says . Russell saw just hours before he died , a source says . Patriots was arrested for domestic violence Friday before marriage . `` She knew nothing about '' her husband being a suspect , Katherine Russell 's lawyer says .
Katherine Russell `` is doing everything '' to help investigators , lawyer says . Russell saw her husband hours before he died , a source says . Tamerlan Tsarnaev was arrested for domestic violence a year before marriage . `` She knew nothing about '' her husband being a suspect , Russell 's lawyer says .