Police are appealing for public assistance to help locate missing Mill Park man Caelin.
The 23-year-old was last seen in Mill Park about 7.20pm on 6 November.
Caelin is likely travelling in a white 2013 Kia Cerato, registration 1YB1IO.
He is known to frequent the Whittlesea area.
Caelin was last seen wearing a light grey hooded jumper, dark grey pants, black runners and was carrying a black bum-bag.
Police and family have concerns for his welfare due to a medical condition, and his disappearance being out of character.
Police have released an image of Caelin in the hope someone recognises him and can provide information on his whereabouts.
Anyone who sights Caelin or has information on his whereabouts is urged to call Mill Park Police Station on (03) 9407 3333.
