WESTFIELD, N.J. (CBSNewYork) – A New Jersey high school principal who lost his life after donating bone marrow to save a sick teen was laid to rest Tuesday.

Westfield High School principal Dr. Derrick Nelson died last week at the age of 44.

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Family, friends, students and teachers attended the funeral at St. John Baptist Church in Scotch Plains.

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

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

He left behind a fiancé and 6-year-old daughter.