Michael Paul Brown, 45, is accused of killing a bartender and three patrons at the Owl Bar a week earlier on Aug. 1.

Montana authorities confirm Michael Paul Brown, the suspect believed to be involved in last week's Anaconda mass shooting, is now in custody.

Michael Paul Brown, the suspect accused by police of opening fire inside a Montana bar and killing four people has been taken into custody, PEOPLE can confirm. According to sources with knowledge of the situation, Brown was taken into custody behind The Ranch Bar just west of Anaconda on Highway 1.