Authorities in Western Montana are pleading for patience as the manhunt for a suspected gunman in a mass shooting that killed four people in Anaconda stretches into a fifth day. Omar Villafranca reports.

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.

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