The story doesn't say specifically that the drug taken by the two young men, Fultz and Steele, was recovered by the police. But assuming that a sample was recovered, hopefully it can be analyzed and identified. But hallucinogenic street drugs have a long history of adulteration and of being something other than advertised.

From reading the article it seems obvious that the face pictured is of Fisher Fultz, and not of Chase Witherspoon.