New York officials say a Brooklyn woman was arrested Wednesday for the murder of a 78-year-old grandmother. The victim was supposedly her friend, according to investigating authorities.

The body of elderly grandmother Edna Pierre-Jacques was found two days earlier. She was lying in a pool of blood in her Troy Avenue apartment. Next to her was a broken hammer head.

Police arrested Tamisha Harper, a friend of Pierre-Jacques Wednesday, according to police sources. Pierre-Jacques died from strangulation. But, the autopsy revealed that she’d also suffered five separate blows to the head from the hammer found next to her dead body.

A NY Daily News report states:

Harper was ordered held without bail when she was arraigned in Brooklyn Criminal Court Thursday.

The motive behind the killing was not immediately clear.

Investigators first targeted Pierre-Jacques’ estranged husband Frederick because he was believed to be the only person in the home with her when the killing took place.

The husband asked for an attorney during questioning and was later released without being charged.