Noor Salman, the wife of the radicalized Orlando nightclub shooter Omar Mateen, was aware of her husband's plan to carry out the terrorist attack people but did nothing to stop him, according to a federal law enforcement source.

Salman was interrogated by FBI agents and is likely to be arrested days after Sunday's massacre at the Pulse nightclub in Orlando that claimed the lives of 49 people and left 53 more wounded.

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Federal prosecutors are already considering charging Salman as an accessory to 49 counts of murder and 53 counts of attempted murder. She may also be slammed with a lawsuit for failure to inform the law enforcers about Omar's impending terror attack and lying to federal agents. A grand jury is expected to start the investigation soon.

Mateen even called Salman during the mass shooting in Orlando on Sunday, according to a source. The source also revealed that Salman is now cooperating with investigators and has told them of Mateen's violent plans.

Salman also confirmed her husband's purchase of deadly weapons before the massacre and has apparently already undergone a polygraph test.

A report by MSNBC, which cited different, unnamed individuals, said that Salman had driven him around as he scouted for different areas to carry out the attack. She allegedly also accompanied Mateen as he purchased ammunition for the premeditated shooting. The sources, however, cited that she tried to talk him out of the attack but to no avail.

Another source also told investigators that Mateen's radicalized tendencies came after browsing through militant Islamic material online at least two years before the incident.

Mateen's father shared that his son had harbored strong anti-gay sentiments. He remembered one time when Mateen bursted out after seeing two men kissing in downtown Miami while he was with his wife and son.

TagsOrlando terror attack, Orlando shooting, noor salman, Omar Mateen, noor salman