Another suspect, Christopher Grant is being held on a $5 million bond after being charged with murder in the trooper's death.
A procession took place Monday to transport Hopkins' body from Saint Louis University Hospital to Waterloo.
A visitation will be held from 3-9 p.m. Saturday, Aug. 31, at Waterloo High School, with a first responder and military walkthrough beginning at 6 p.m. His funeral will be held at 10 a.m. Sunday, Sept. 1, also at the high school.
Hopkins leaves behind his wife, Whitney, and three young children.