The December attack allegedly targeted a Hanukkah celebration, with investigators claiming the gunmen displayed an Islamic State flag shortly beforehand.
Temple has appealed to the public for assistance, urging anyone who may recognise the individual seen in the CCTV footage or who has information about the theft to contact police.
Aidan Becker, an off-duty security guard, died on Friday evening after police allege he intervened when four teenagers attempted to rob the schoolboy just before 6pm at Mernda Railway Station, in Melbourne’s outer north.
