The body was found in the river in Wyoming by a kayaker around 7:30 p.m. Tuesday, Wyoming police said.
Autopsy results are pending.
Tornga, 51, disappeared around 1 a.m. Sunday after an argument with her husband, family members said. They were driving home from a birthday party in Grand Rapids when she reportedly got out of the car near Market Street and I-196. One of her shoes was found nearby.