(NBCNEWS) — NBC News has learned that San Bernardino shooters Syed Rizwan Farook and Tashfeen Malik spent at least a year preparing for their terror attack, practicing at a local gun range and making financial plans for their family after their deaths.
Two sources said Farook and Malik had practiced their shooting skills at a Riverside, California-area gun range for a year or more before last Wednesday's attack on a holiday office party. They killed 14 people and wounded 21 more with firearms at the Inland Regional Center in San Bernardino.
San Bernardino Shooter Received Deposit of $28,500 Weeks Before Attack 2:24
Counterterrorism officials also told NBC News that Farook and Malik were making preparations for some time to "take care of both grandma and the baby." The couple lived in a Redlands, California residence with their 6-month-old daughter and Farook's 62-year-old mother, Rafia Farook. They left their daughter with Rafia Farook on the morning of the attack.
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