The source said most visitors heed the advice and ditch their contraband before leaving the bus.
The jailers then collect all of the weapons and drugs, as well as packs of cigarettes and rolling papers, which are considered contraband because smoking is banned on the island.
But visitors often try to smuggle in weapons.
“They’re giving it to the inmate to carry out a gang hit,” the source said.
So far, correction officers have made 35 arrests, including one in which a former inmate returned with a scalpel in his mouth to visit a jailed associate.
“It’s amazing how many people carry weapons on the streets,” the source said.