WESTFIELD, N.J. (CBSNewYork) – A New Jersey high school principal who died after donating bone marrow to a sick teen will be laid to rest this week.

Flags are flying at half staff Monday in honor of Dr. Derrick Nelson.

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The Westfield High School principal died last week at the age of 44.

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He was in a coma for a month after donating bone marrow to a 14-year-old boy in France.

Nelson also served 20 years in the U.S. Army Reserve.

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A viewing will be held from 5 to 9 p.m. Monday at St. John Baptist Church in Scotch Plains. His funeral is set for Tuesday.