FBI Director James Comey told a Senate panel Wednesday that the killers responsible for last week's California massacre were individually radicalized before they began communicating online prior to their marriage and discussed jihad more than two years before the deadly assault that left 14 dead and 21 wounded.

FBI Director James Comey said Wednesday that Syed Rizwan Farook and his wife, Tashfeen Malik, began scheming to carry out a terror attack long before they were engaged and before she moved to the United States on a fiancee visa last year.

FBI Director James Comey says the two San Bernardino, California shooters were radicalized at least two years ago and had discussed jihad and martyrdom as early as 2013.

A portrait is slowly beginning to emerge of the couple who killed 14 people in San Bernardino on Wednesday. But officials admit they have far more work to do before they can answer some key questions about Syed Rizwan Farook and Tashfeen Malik.

A 28,500 deposit was made to Syed Farooks bank account from WebBank.com on or about Nov.18 some two weeks before he and his wife Tashfeen Malik carried out the San Bernardino massacre, a source close to the investigation told Fox News Monday.

The terrorism investigation into the California assault increasingly is focused on the wife as the likely driving force, with officials now suspecting that the Pakistani immigrant radicalized her American-born husband.

The woman who helped her husband kill 14 people at a holiday banquet for his county co-workers pledged allegiance to the Islamic State group and its leader on Facebook using an alias, then deleted the messages before the attack, a U.S. law enforcement official said Friday, providing the strongest evidence to date that the rampage may have been a terrorist attack.

One of the two people involved in the attack that pledged allegiance to the leader of the Islamic State in a social media posting, two officials said.

Tashfeen Malik, one of the shooters in Wednesday's attack in San Bernardino, CA., pledged allegiance to ISIS on Facebook in the middle of the attack, according to CNN.

The mysterious Pakistani woman who with her husband gunned down 14 Wednesday at a Southern California holiday party had reportedly pledged her allegiance to ISIS according to a government source in what appears to be concrete evidence that the rampage was at least inspired if not directed by the terrorist group.