'She Didn't Want to Profile': CA Neighbor Failed to Report Shooters' Suspicious Activity

WATCH: Police and San Bernardino Shooting Suspects Exchange Gunfire

The female shooter in Wednesday's attack on a San Bernardino office building had pledged allegiance to ISIS, according to new reports.

Tashfeen Malik, 27, reportedly did so in an online posting using another name. 

Malik was the wife of the other attacker, 28-year-old Syed Rizwan Farook. She was a Pakistani who married Farook after they met in Saudi Arabia. 

Trace Gallagher reported the latest details from San Bernardino on "Happening Now," saying the killers watched ISIS propaganda videos online.

They also had contact with individuals being investigated for terrorism ties. 

It's now believed that Malik radicalized Farook and was the one with the knowledge of how to make bombs. 

Gallagher said that over the last year, Farook had become more devout, growing a beard, memorizing the Koran, and going to a mosque twice a day. 

Farook had argued with a co-worker recently about whether Islam is a peaceful religion. The man involved in the argument was killed in the massacre when the couple opened fire on an office holiday party.

Farook had been working as an environmental specialist for the county health department for five years.

Police are trying to locate a man who legally purchased two of the guns used in the attack and gave them to Farook. 

The other two guns were purchased legally by Farook, who did not have a criminal record.

Gallagher said police are looking into the money trail as well because the couple is believed to have had around $30,000 worth of weapons, ammo and gear. 

Farook made around $50,000 a year, while Malik was unemployed.

Watch the full report above.

'They're Coming Here to Kill Us!': Pirro, Geraldo Spar on Guns, Radical Islam

Doocy to Earnest: Obama Thinks Common Sense Gun Laws Would Stop Terrorists?

Ex-FBI Official: Here's Why Banning Guns Is No Longer an Option