This article states the women were last seen drinking alcohol at 6:45. Where did the women go between 6:45 and 8:15 when they needed assistance in getting to their rooms. This leaves a window of an hour and a half. I know there was no evidence of violence to their bodies, but what if they were given a date rape drug. They wouldn't be capable of fighting off an offender, so no need to cause harm to their bodies. Does anybody know if there was any mention of male DNA found on the women? The combination of alcohol and a date rape drug could cause respiratory failure.
On the other hand, there were medications found in their room. The combo of alcohol all day and medications could have led to their deaths depending on what the medications might have been.
Police spokesman Jean Toussaint said: "From the observation done by our police officers, there was no disturbance in the room and the two sisters were found unresponsive on the same bed."
Preliminary examinations done show no sign of any violence has having caused their deaths.
However, medications were taken from the room to be analysed.
Mr Toussaint continued: "What the police can say about the investigation so far is that the two sisters were consuming alcohol throughout the day."
And the last time they were seen drinking alcohol was at around quarter to seven and they were helped to their bedroom by hotel personnel at around 8.15 pm."
http://www.mirror.co.uk/news/world-news/cause-death-revealed-after-sisters-8952905