A grave breach of the peace refers to suspicions that a deceased person has been handled in a particularly ruthless manner, such as dismemberment.
A detention hearing will be held at 1 p.m.
The 25-year-old woman disappeared on Boxing Day night and was found dead after a search operation on the evening of December 27.
In addition to the person who is now being held in custody, another person was arrested and detained on reasonable suspicion of kidnapping, a lower level of suspicion. That person was released and removed from the investigation on Monday.
