According to police, the suspects arrived in Dubai the day before the killing. Five of them carried out the crime while the remaining six served as lookouts, police said.Police identified a man from France as the logistical mastermind. Police allege the man stayed at a luxury hotel in Dubai, but also booked a room at the al Bustan Rotana hotel where al-Mabhouh was killed. The French suspect requested room 237 -- directly across from where al-Mabhouh was staying in room 230, police say, but the suspect apparently never stayed there. Instead, police say the rest of the group used the room to plot the killing and the alleged mastermind left the country before it was carried out.Footage on security cameras at Dubai International Airport show one of the suspects following al-Mabhouh after he landed, police said Two others followed him once he arrived at the hotel, police said, taking the same elevator and ensuring al-Mabhouh was staying in room 230.