Tauzin instead was entirely focused on whether Stewart lied to investigators, suggesting the possibility of an obstruction of justice charge being levied against her.

FORBES: Congress To Martha: Tell It To The Feds

Alan Dershowitz, a prominent defense attorney and Harvard law professor, called the obstruction charge "weak, " suggesting it was meant to pressure the suspects into providing more information on Tsarnaev.

CNN: 3 more detained in Boston attack

Alan Dershowitz, a prominent defense attorney and Harvard law professor, said called the obstruction charge "weak, " suggesting it was meant to pressure the suspects into providing more information on Tsarnaev.

CNN: 3 more detained in Boston attack