Officers responded to the threat on St. David Street on Nov. 19 after a note was found, indicating that there was a bomb in the business.
The building was evacuated until the threat was deemed to be a hoax. A nearby school was also placed into a hold-and-secure during the investigation.
OPP announced on Wednesday that a Walmart employee was arrested. Marjorie Anne Gray has been charged with uttering threats, falsifying information and mischief.
Police didn’t say why she allegedly wrote the note.
They are still looking for information which can be directed to investigators at 1-888-310-1122. Anonymous information can be left with Crime Stoppers at 1-800-222-8477.