During the arrestation of Jang Sung Thaek (a so-called former numer 2 of the DPRK), various DPRK watchers indicated that some of his closest allies were also executed. One of them was probably Ri Chol (a.k.a Ri Su Yong, the former DPRK ambassador to Switzerland and the former tutor of Kim Jong Eun).
Watching some Soutk Korean analytical documents, it can be noted, that Ri Chol was present during the arrest of Jang Sung Thaek. Ri Chol was probably saved because he’s highly connected to the Kim family . He’s probably a kind of member of the Kim family (he has several titles such as director in various DPRK companies, deputy director of the federation of Christianists of the DPRK, etc). It should be also noted that the meeting of the CC KWP was only reserved to a certain number of KWP members as of the entire hall wasn’t occupied. In order to prove the previous assumptions you may use the following pictures:
On this first picture Ri Chol is encircled in red (DPRK tv printscreen)
On this second picture please remark, that rows are empty (up to the red line). The entire hall can welcome more than 2 thous. Deputy. At the meeting related to the arrest of Jang Sung Thaek, there were only 200 selected KWP members. rows