Boston Marathon bombing suspect's in-laws testify at grand jury
BOSTON (AP) - The in-laws of slain Boston Marathon bombing suspect Tamerlan Tsarnaev testified on Thursday before a federal grand jury investigating the deadly April 15 attack.
Mrs Judith and Mr Warren Russell, parents of Ms Katherine Russell, declined to comment to The Associated Press (AP) as they entered the grand jury room in United States (US) District Court in Boston.
Ms Katherine Russell is the widow of Tsarnaev, who was killed following a gun battle with authorities pursuing him and his brother for allegedly setting off two bombs near the race's finish line, killing three people and wounding more than 260.
The US Attorney's office would not comment on whether Ms Russell or anyone else is being investigated or why a grand jury continues to meet after four people have already been indicted.