A 17-year-old shop assistant who was threatened at gunpoint during a robbery in Melbourne's north had been in the job for less than a month.
A pair of armed bandits held up the Supre Broadmeadows store just before closing time on December 29.
They demanded the 17-year-old part-time staff member get down on the ground as they took two cash register drawers of cash.
Seven other staff members were in the store, plus several customers.
Detective Senior Constable Luke Bryant says the men had a getaway car waiting and they struck just before the store was due to close.
"It appears that there may have been some degree of planning, preparation if you will, in regards to this vicious attack," he told reporters on Friday.
"At this stage it appears to be an isolated incident."
Supre loss prevention manager Sarah Brittain said the victim had been employed with the company part-time for less than one month when the robbery happened.
She said the teen had returned to work this week after taking a holiday that was already planned before the incident.
"She (the victim) is going through a lot of emotions, feeling very victimised and extremely, extremely, extremely shocked and distraught," Ms Brittain told reporters.
She said Supre had boosted security at the Broadmeadows store and was considering security improvements across the company.
Police believe the getaway car was driven by a third man and travelled west on Rignall Street before last being seen in nearby Somerton Road.
The offenders were believed to be aged in their 20s and between 170 and 180cm tall.
They were wearing dark, loose fitting clothing and stockings over their heads, and got away in a grey or silver 2003 Mitsubishi outlander with a front nudge bar and slimline roof racks.