THE same man is believed to have held up the Erotic Nights adult shop in Frankston three times in the one week.
The drug-addled thief stole about $3200 worth of synthetic cannabis in the raids at the Young St store on 18, 22 and 25 September.
In the first raid the man aged in his mid-late 20s walked into the store and pointed a large knife at the shop assistant before helping himself to packets of the substance valued at $2000.
In the second raid the man again carrying a large knife pushed past the female attendant, aged 56, and stole $800 of the same substance before running off.
In the third raid the man told the female shop assistant to step out of the way while he grabbed $400 of the substance from shelving.
He is described as Caucasian, 175-180 centimetres, solid build, brown hair, wearing a grey/green hoodie and green tracksuit pants, or grey shorts and a black backpack.