WESTFIELD, N.J. (AP) — A New Jersey high school principal who went into a coma after he donated bone marrow to a 14-year-old boy in France has died. Family members tell NJ.com that Westfield High School Principal Derrick Nelson underwent the donation procedure at a hospital in February.

They say the 44-year-old couldn’t speak or move afterward, and remained in that condition until he died on Sunday.

READ MORE: Philadelphia-Area Clinics Temporarily Close, Pivot After FDA, CDC Recommend Pausing Use Of Johnson & Johnson's COVID-19 Vaccine

Nelson’s father says it’s still not clear what happened to his son, who was the father of a 6-year-old girl.

Friends say Nelson didn’t know the French teen he was trying to help.

READ MORE: Lateshia Hill's Family Vows Justice Will Be Served After Deadly Triple Shooting In Wilmington

Besides his work in education, Nelson had served as an officer in the Army Reserve for more than 20 years and had recently re-enlisted. His military service included an assignment in the Middle East.

(© Copyright 2019 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)

MORE NEWS: Duante Wright Shooting: Dozens March In Philadelphia In Protest Of Fatal Police Shooting