Mystery surrounds how a man found unresponsive in a Randalstown nursing home bed came to have marks on his neck.
That's what a coroner's court has heard.
56 year old Seamus McCollum, who suffered cerebral palsy, was discovered at Maine Nursing Home in September 2011.
The court heard there was a difference of opinion among experts over potential causes of the marks, which were consistent with a compression of the neck.
Coroner Joe McCrisken has set aside three days for a full inquest without a jury, at Belfast Laganside Court later this month.
Mike Nesbitt to retain position as Health Minister
Storm Chandra named as Met Office issues fresh weather warnings
Jury sworn in for Noah Donohoe inquest
Sharing of explicit AI images in Armagh school being investigated by police
Long-awaited inquest into death of Belfast schoolboy Noah Donohoe due to start