(NECN: Kathryn Sotnik, Boston) - As the investigations into the Boston Marathon bombings continues, there's now some finger-pointing between law enforcement officials.
In Congressional hearings in Washington D.C. Thursday, Boston police Commissioner Ed Davis says the FBI never told them of special intelligence on dead bombing suspect Tamerlan Tsarnaev prior to the marathon bombings.
His answer prompted the FBI to fire back, saying Davis "specifically" had several officers assigned to a special team that investigated Tsarnaev two years ago.
Joseph Wippl, former CIA agent and current Boston University professor, says even if Boston police interviewed Tsarnaev prior to the bombings, there's still no telling the outcome.
"I think there were mistakes in communication - that could have been better, but would that have resulted in no terrorist act? It's impossible to know," he says.
On the other hand, retired FBI agent Tanya DeGenova, now president of the TSD Security Consulting Group, believes it wasn't a lack of communication, but rather a lack of awareness.
"I think it was an overall lack of perception that this man posed a threat," she says.
DeGenova goes on to say, "Based on the Department of Justice guidelines the FBI did everything they were supposed to do for an assessment."
And while the marathon attacks tragically weren't thwarted, both DeGenova and Wippl still believe our country has come a long way since 9/11 with information sharing, but another review will be needed.
"Politically this is what the result will be, renewed efforts to communicate on all levels between various agencies," says Wippl.
Commissioner Davis' time on Capitol Hill may not be over.
The U.S. Senate also plans to hold hearings on the bombings as well.