Why were the remains of al-Baghdadi's body transferred to the "Ayn al-Asad" base in Iraq?

Unknown source from a news agency claims that the remains of Baghdadi were transferred to the "Ayn al-Asad" for tests to confirm his identity after he blew himself up and fragmented most of the body.

The sources said that eight helicopters participated in the operation targeting al-Baghdadi, which was launched from the Iraqi area of Sreen, flying over the Syrian-Turkish border through the Syrian areas of Jarablus and Al-Rai with the participation and coordination of Turkey and the "Syrian Democratic Forces."

It confirmed that Jabhat al-Nusra had cordoned off the area, banned access to it while targeting Baghdadi, and arrested a shepherd who was present in the area at the time of the attack.