The Bucks County district attorney's office says the vial was recovered in connection with the investigation into Nicholas Helman, the 19-year-old Hatboro man charged March 19 with delivering a birthday card laced with the deadly toxin to the home of his ex-girlfriend's boyfriend.
A day later, authorities found a vial inside a bag stashed under the lid of a gas main near Helman's home.
The district attorney's office said test results came back Tuesday confirming the material in the vial was ricin.
Helman is facing charges including attempted murder and risking a catastrophe. He is being held without bail.