Oskaloosa police are investigating a shooting at a home on 4th Avenue late Saturday night… A woman sustained a gunshot wound to the back as she was in her home at 602 4th Avenue East around 11 pm Saturday night. Officers found shell casings  along 4th Avenue East and at the intersection of South 5th Street. Bullets were also recovered from a nearby tree and wall of the home. The victim’s name and condition were not released. The public is asked to call the Oskaloosa Police Department if they have information regarding the case.  The investigation is ongoing.