Direct confrontation with PoI-268-2 is unauthorized unless approved by Level-4 personnel.
Unauthorized sounds weird here, it would be better if you changed it to "not permitted". Change "unless approved by" to "without the approval of a"
The primary anomalous property of RPC-268 is activated when RPC-268 is used to photograph a human individual within range of the capture lens. The photographed individual will be depicted as deceased by the developed film of RPC-268, hereafter RPC-268-1
Insert "referred to as" between hereafter and RPC-268-1
Multiple individuals within an instance of RPC-268-1 will be affected; however, information regarding their possible means of demise is limited to what of their body is captured in the instance.
Changed "what of their body" to "which parts of their body"
RPC-268 has shown no signs of sapience/sentience, nor do individuals show any changes to their ACS Reality levels.
The article has not implied sentience or sapience so this piece of information seems unnecessary
Those in possession of RPC-268 are immune from the anomalous properties when taking a self-portrait.
Changed "immune from the" to "immune to its"
Any attempts, precognitive or impromptu, to alter or frustrate the means of death depicted in RPC-286-1 instances have invariably met with failure.
Insert "been" between invariably and met
This effect has not been re-demonstrated despite attempts.
Change this to "This effect has not re-occured despite attempts to recreate it."
The subject was depicted as pruned and waterlogged, suggesting drowning as the cause of death. The subject was tagged and surveilled by Authority agents remotely, and covertly cordoned away from proximity to any appreciable body of water.
Cordone means to prevent access by surrounding someone or some place with troops. Find a better word here.
Overall I liked the article, would probably give it a 4 in its current state. Also, the article mentioned regeneration (though slow) at several points, so wouldn't this be a regenerative hazard? Either that or that aspect could be removed as in the end it doesn't have a huge effect on the anomaly.