NCIS Season 4
Leyla's boyfriend/fiancee smuggled her from Baghdad to Washington, D.C. due to fear of what the Shakarji family would do, as according to Shada Shakarji she brought shame on the family when she became pregnant with Liam O'Neill's child.
According to Mike, Liam and Leyla were to be married but Liam was killed before they were able to do so.
NCIS Season 7
Mike Franks brings Leyla and his granddaughter, Amira, from Mexico to Leroy Jethro Gibbs's home for protection after two men showed up at his home and attempted to take them.
NCIS Season 11
In NCIS season four's Iceman (episode), Leyla was portrayed by an unknown black acress, but from season seven's Outlaws and In-Laws (episode) she is portrayed by acress Tehmina Sunny, who is of Indian descent.