James Le Mesurier, whose Mayday Rescue organization founded and supported White Helmets' rescue efforts in Syria, was found dead near his home in Istanbul on Monday, prompting a wide-ranging police investigation.
The death of Le Mesurier, a former British army officer whose body was discovered near his home in Istlanbul's Beyoğlu district by worshippers headed to a mosque, was confirmed by both the MayDay Rescue and White Helmets international organizations.