SILVER SPRING, Md. — The death of the Montgomery County police officer who was fatally shot Monday has been ruled as a result of "self-inflicted injury" by the Office of the Chief Medical Examiner of the District of Columbia. 

Officer Thomas J. Bomba, a 13-year veteran of the Montgomery County Police Department, was found shot on the top level of a parking garage in Silver Spring. He was transported to the Washington Hospital Center where he later died. 

As the news of the shooting broke online, witnesses began to share their experience on social media. The heavy presence of police caused residents to be uneasy. One couple told us they couldn't believe this was happening in Silver Spring. The couple was leaving from a doctor's appointment. 

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In a Twitter video from Tanya LaNice, you can see several dozens of officers and police vehicles lining the street. 

In a video from Arnie Appleby, you can see residents run across Fenton Street as an officer is carrying a large rifle towards Leb Tav, a restaurant. 

WUSA9 Reporter John Henry captured video of men wearing tactical gear, carrying rifles. 

One woman said the shooting happened just across the street from where she works. They were sheltered in place at the time.

Bill Schultheiss said he saw a massive response of at least 30-40 police cars. 

For those at home or work, watching the news unfold on social media was alarming. 

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One user said this is typically his way to work and the shooting happened around the time he would arrive on a shuttle. 

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