Richard Ryan Laubach is charged with first degree murder charge after Elmore County prosecutors say he is responsible for fatal injuries suffered by his 22-month-old stepson earlier this week — including a broken leg and a fractured skull.

Prosecutors also say the death of Joseph Graham Wednesday isn’t the first time Richard Ryan Laubach hurt his stepson.

Mountain Home police cited Laubach in September on a misdemeanor charges of domestic battery and injury to child. The child victim in that case was Joseph Wayne Graham, prosecutors say.

Those charges were dropped by Mountain Home City Prosecutor Phillip Miller in December after Miller said Laubach completed an anger management program, a parenting program, a family safety seminar, and two sessions of marital counseling, according to court records.

Court officials said Thursday they never got official confirmation that Laubach completed those requirements.

Ada County Coroner’s office officials say Joseph died from “abusive head injuries” at a Boise-area hospital Wednesday — and police say Laubach is responsible.

Laubach, a Mountain Home Airman, was originally charged Tuesday with felony injury to child in connection with the death of Joseph Graham but Elmore County prosecutors changed that to first degree murder before Laubach made his first court appearance Thursday.

Laubach is now being held in the Elmore County Jail on no bond.

Mountain Home police have released little information on murder case. All they will say is they were called to an undisclosed Mountain Home residence by paramedics just before 3:30 p.m. Tuesday who had concerns about the injuries suffered by the boy, who was unresponsive.

Paramedics took the boy to a Boise-area hospital for treatment, where he died Wednesday.

In addition to the broken bones, Joseph Graham also had significant bruising on his body and brain swelling, according to Ada County prosecutor reports.

Mountain Home police say they were able to gather enough evidence to serve Laubach with an arrest warrant at the hospital Tuesday night.

Deputies took Laubach from the Ada County Jail to Elmore County Jail Thursday.

Prosecutors charged with Laubach with first degree murder because they say he killed Joseph Graham while committing an aggravated battery.

The death of the boy is the first homicide case for 2013 in Elmore County.