Nonprofit helping pay off mortgage on slain police officer's family home

This Dec. 10, 2012 photo shows Weymouth Police Officer Michael C. Chesna in Weymouth, Mass. (Gary Higgins/The Quincy Patriot Ledger via AP)

Credit: Gary Higgins

Credit: Gary Higgins

This Dec. 10, 2012 photo shows Weymouth Police Officer Michael C. Chesna in Weymouth, Mass. (Gary Higgins/The Quincy Patriot Ledger via AP)

A nonprofit organization has announced a major donation to help pay off the mortgage on a slain Massachusetts police officer's family home.

Weymouth police Sgt. Michael Chesna, 42, was shot and killed Sunday in the line of duty.

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The Stephen Siller Tunnel to Towers Foundation is providing the first $100,000 toward the mortgage and is challenging others to support the family through the initiative.

Any money raised exceeding the mortgage will go directly to Chesna's wife and two children.

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The foundation, established in memory of a fallen 9/11 firefighter, supports military and first responders who are killed in the line of duty. In addition to his service with the Weymouth Police Department, Chesna was also a military veteran who served in Iraq and Afghanistan.

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Frank Siller, chairman and CEO of the foundation, will join Weymouth police Chief Richard Grimes at the Weymouth Police Department at 3 p.m. Wednesday to make the official announcement.