Attack on Gendermes in Douala: Disgruntled officer or thief? The unanswered question

Pressmen were forced to come back to what they wrote,now quoting the release.

But there are many unanswered questions here.

How did the young thief get hold of munition to scare the Gendarmes?
Gun shots started since Wednesday night,meaning he planned the act in advance with enough reserve to challenge dozens of Gendarmes??
When an incident happens,the name of the culprit is easily given to journalists,gendarmes or police even write on their chests,why has the name of the assailant not made known???

Was it a common thief as National Gendarmerie claims or was it a former Gendarme officer as early press reports suggest???