The Pulse: New Possible Motive in Fort Hood Shooting

This is Friday's edition of -- The Pulse.

Number five -- Facebook already uses facial-recognition software to suggest tags on photos, but new technology called "DeepFace," is more accurate because it can identify people from the side. Researchers say it recognizes the correct face 97-percent of the time. A Facebook spokeswoman says it is not clear how or even if Facebook will ever use "DeepFace." Right now, it is in the research phase.

Number four -- After a bit of winter hibernation, the U.S. job market is waking up this spring. 192,000 jobs were added to payrolls last month, according to the U.S. Bureau of Labor Statistics. Those job gains came entirely from the private sector, which means non-government employment is back to its peak before the financial crisis.

Number three -- The FDA has approved a hand-held injector containing medication that can reverse heroin overdoses. It is called Evzio. It is injected into muscle and releases a drug that stops heroin and other opioids from fatally slowing a person's breathing. The kit costs about $60 and comes with two pre-filled syringes. The device is described as "user friendly" and does not require any training.

Number two -- Today marks the 46th anniversary of the assassination of civil rights leader Martin Luther King Junior. On April 4th, 1968, King was struck by a single bullet while standing on the balcony of a Tennessee motel. He later died at the hospital. An escaped convict, James Earl Ray, was found guilty of the murder. He died in prison in 1998.

Number one -- Investigators searched the home of Fort Hood shooter Ivan Lopez and are digging deep into the Iraq war veteran's past and his combat experience. 34-year-old Lopez killed three and wounded 16 others on the Fort Hood military base Wednesday. Fort Hood's commander said Friday afternoon that Lopez's reported psychological issues were not a direct cause. At this time, they believe an escalating argument in Lopez's unit area may have been a factor. Lopez had also been treated for depression and anxiety, and was being evaluated for post-traumatic stress disorder. A memorial service will be held on the base next Wednesday for the three men killed. Sergeant Carlos Lazaney Rodriguez, age 38, was a 20-year Army veteran. Sergeant Danny Ferguson, a 39-year-old Florida native, who just returned from Afghanistan and Sergeant Timothy Owens, a 37-year old Iraq and Kuwait veteran, from Illinois.

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