Palestinian refugee Mohamed Yehya AlBobali, aged 18, has been enduring a mysterious fate since August 15, 2011.
The Syrian authorities continue to withhold information about his condition and whereabouts.
AlBobali was a resident of AlRaml Camp for Palestinian refugees in Latakia.
AGPS documented the incarceration of 1,696 Palestinian refugees in Syrian government jails, among them 106 women and girls.