Marcella Gramlich

Marcella Gramlich died in October 2011. (Gregory's Funeral Home)

A Calgary woman has pleaded guilty to a reduced charge of manslaughter in the beating death of Marcella Gramlich.

Diane​ Palmantier, 41, was originally charged with first-degree murder in the beating death in October 2011. At the time, police said the woman was beaten for hours. 

An agreed statement of facts in the case was heard Wednesday at the Calgary Courts Centre.

Palmantier admitted she repeatedly struck Gramlich, 53, as they were driven around the city drinking whisky.

When Palmantier and the male driver realized how badly the woman was injured they drove her to the Peter Lougheed Centre and put her in a wheel chair, according to the statement.

It’s believed the woman was already dead.

The autopsy lists multiple internal and external injuries, including skull fractures, scratches and bruising.

The driver was not charged in the death. According to the facts read out in court, there were pools of blood inside the truck and blood on the driver's shoes.

Rod Gramlich, the victim's older brother, said he is disappointed the man was not prosecuted along with Palmantier, who said little about the driver's involvement.

"They know full well a murder was committed."

Gramlich says justice hasn't been served but he is confident the Crown will try to obtain the maximum possible term when Palmantier is sentenced later this year.