Exclusive: Investigators piece together portrait of Pakistani woman in shooting massacre

Tashfeen Malik's path to accused mass killer in California began in a small city on the Indus River in Pakistan's Punjab province. It was from here, when she was a toddler, that she moved with her father Gulzar 25 years ago to Saudi Arabia, where he became more deeply religious, more conservative and more hardline, according to a family member.

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