They found 36-year-old Tammy Balzer of Davenport unresponsive. She was transported to a Davenport hospital and died several days later.
A follow-up investigation resulted Tuesday in charges being filed against 28-year-old Kiel Kiwala of Davenport. Kiwala is charged with involuntary manslaughter and two counts of delivery of heroin and is in Scott County Jail.
(Reporting by Phil Roberts, Davenport)