Stymied by treacherous terrain and untamed wilderness, authorities are struggling to find an Army veteran suspected of killing four people at a Montana bar. But the difficult landscape isn’t the only challenge.

A manhunt for the Iraq military veteran suspected of fatally shooting four people at a bar in Montana continued for a fourth day on Monday. On Friday at around 10:30 a.m. local time, Michael Paul Brown,

The mental health of suspected Montana gunman Michael Paul Brown, 45, declined significantly following the death of his mother, relatives said.