He used glitter NOT powdwer!!!
No, Vanessa got powder.
FTA:” Authorities were able to track down Frisiello by analyzing a “glitter bomb” letter — a prank where envelopes are filled with glitter — sent to Stanford University law professor Michele Dauber. Investigators matched the text font in the “glitter bomb” threat to those seen on the letters of the white-powder envelopes.”
They were able to match the text font from his “glitter bomb” letters he had sent, this guy is really sick!