A little-reported medical evacuation transport flight that crashed in New Mexico in May has received a fresh groundswell of media scrutiny, prompting the National Transportation Safety Board to say it is actively investigating the incident almost three months later.

The flight traveling from Roswell Air Center, New Mexico, to Sierra Blanca Regional Airport in the same state in the early hours of May 14 flew near where the U.S. military was conducting “GPS jamming activities,” and the aircraft crashed, killing the four people on board.