On the morning of July 1, 1990, 87-year-old resident Nancy Lagerquist was found missing from her bed during a 4:30 a.m. check at the Riverside Health Care Facility in Missoula, Montana. She could not walk on her own, and an hour earlier a staff member had observed her sleeping. A search of the facility turned up nothing until her body was recovered in the Clark Fork River about 100 feet downstream from the nursing home, caught in willows.

The death was violent: investigators determined Lagerquist had been taken from her room, assaulted, and discarded in the river. The river washed away much potential forensic evidence, and none of the facility alarms had been triggered that night. Police later revisited the death of 86-year-old resident Bertha Scott, who had died at the same home a few months earlier, and have said the two cases may be linked.

No definitive suspect has been identified and the murder remains unsolved. Does anyone have information about residents, staff, or visitors at the Riverside facility in mid-1990 who might help advance this investigation?