COEUR d'ALENE - A Hayden Lake man is facing up to 20 years in prison for allegedly breaking the leg of his fiance?e's child.Michael R. Edinger, 27, waived his preliminary hearing Thursday morning, meaning there is enough evidence on the two counts of felony injury to a child to warrant a trial.

Each count carries up to 10 years in prison. "There's so many hearts breaking," said Linda Cook, maternal grandmother of the injured boy, of the two involved families. "The stress is tremendous ... It sucks the life out of you."

Edinger, arrested Sept. 25, remains in Kootenai County Jail on $100,000 bond. He was jailed after he and his fiancee, Rebecca L. Mullin, took Mullin's 2-year-old son to Kootenai Medical Center Sept. 24 with what nurses called an unexplainable broken leg.The couple originally told officials that the boy was out of sight when they heard a loud scream and found him at the bottom of a stairway, attributing the fracture to a fall, according to Kootenai County Sheriff's reports.

But after examination nurses said the boy's spiral fracture of the left femur likely didn't occur from an accidental fall. They said the fracture required "a lot of force to break, and not consistent with falling down stairs, or normal kid play," reports state.Later, Edinger told investigators he'd lost his temper and broke the boy's leg while changing his diaper, "forcefully grabbing his leg, (and) twisting it," according to reports.

During questioning Edinger was "emotionless," while the mother "routinely sobbed and showed genuine emotion" over the boy's injuries, reports state.Later, Mullin admitted to investigators she wasn't at the home during the time of the alleged fall, and she had lied to investigators because she'd originally told doctors that, and "feared changing her story."

The couple had lived together in Hayden Lake since around March.Nurses said they also discovered other broken bones while the boy was examined, according to reports.

Cook said that the boy had a fractured forearm suffered several weeks prior that healed properly without medical attention. She said news blindsided the family, and that Mullin was "exhausted" and "in a very fragile state" since the news, but that doctors have since told the family that the boy's leg is expected to recover fully.

Edinger is the nephew of Coeur d'Alene City Councilman Ron Edinger.