Steven Carlson, 51, was found fatally shot in a ditch in a rural area near Council Bluffs, Iowa, on August 7, 2019. His death was the first in a violent sequence that unfolded that day and ultimately left two men dead.

Later that same day officers confronted 40-year-old Troy Bonar in a standoff during which Bonar held a woman hostage. The standoff ended in a shootout; Bonar was killed and the hostage rescued. Authorities later found the body of a second victim, Larry Rave, inside the home where the standoff occurred; Rave had also been shot to death. Investigators concluded Bonar was the sole person responsible for the murders of Carlson and Rave. Reports indicate the violence grew out of a dispute among the three men, though no definitive motive was released.

If anyone knew Steven Carlson, his movements on or before August 7, 2019, or the relationships among Carlson, Bonar and Rave, please share what can help the case.