They wished to make no further comment.
The staff member was unaware of how the security footage came to be on Facebook, but since its upload the video had received over 2200 shares and 73000 views.
Commenters on the post have expressed their disgust at the woman's actions, and called for anyone to come forward who knows her.
"Shame on her," one person said, while another wrote "The poor old lady is in for a shock".
On commenter posted that she had heard that the elderly victim had $300 in her purse at the time.
Others suggested this was a good warning to keep your handbag on you, or within eyesight at all times.
A police spokesperson confirmed they had received a report from the victim and were investigating the incident.