( NewsNation) — Montana Gov. Greg Gianforte and Attorney General Austin Knudsen will hold a news conference Tuesday as a search for the suspect in a deadly bar shooting moves into its sixth day. Michael Paul Brown, 45, a U.S. Army veteran, is accused of killing four people at the Owl Bar in Anaconda, Montana, on Friday.

Authorities are searching for 45-year-old military veteran Michael Paul Brown who killed four people at a Montana bar on Aug. 1.

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