Arsenic trioxide, commonly known as "arsenic" in the East, is an impurity-free extract, odorless and tasteless, in the form of white powdery frost.
Alprazolam, a benzodiazepine sedative tranquilizer, classified as a psychotropic substance.
Both items cannot be easily purchased; only the Underworld could obtain such a large quantity capable of killing 26 people.
Previously, Mona and others were contemplating how to prove that Hector Jamie brainwashed Lady Ao Na, who willingly poisoned others and then committed suicide by taking the poison herself, while Luo An was pondering where Hector Jamie obtained these lethal substances.
Thinking about that crime website filled with all sorts of evil, and recalling that it was on that website where Hector contacted the three people including Petro, Luo An made a bold conjecture that Hector most likely purchased the drugs on that website.
