A SNIFFER dog at The Mount jail in Bovingdon caught a man who was trying to smuggle in heroin and cannabis, a court heard.
Fidel Blackett hid the drugs under two pairs of underpants in an attempt to avoid detection and supply them to a relative.
But the 23-year-old, who was waiting with his mother, attracted the attention of the dog and was arrested, St Albans Crown Court was told.
Blackett was jailed for 30 months after admitting possession of class A and B drugs with intent to supply.
He also pleaded guilty to possessing class C drugs after an ecstasy-like drug was found following a search of his home in Alexander Court, Wembley.
The packs contained 3.5 grammes of heroin and 18 grammes of cannabis. The court heard the heroin had a street value of £350, but in prison would be worth up to £3,500. The cannabis was worth between £50 and £70 on the street but would fetch seven to ten times that in prison.