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Authorities say Santamaria, Adalberto Perez and Roberto Cabrera caused noxious fumes to fill the cabin of the TransValue Inc. truck that was transporting gold bars from Miami to Boston.

Two armed robbers removed and bound the TransValue employees and then transferred the gold bars to their vehicle and fled.

The affidavit doesn't say how Perez was able to gain access to the truck, if he had any relationship with the TransValue shipping company, or if the plot involved still more accomplices.

But the friend said "Perez said he placed this technology under the TransValue trailer in order to track its location," and that Perez also rigged a pepper-spray device inside the cab, the affidavit says.

TransValue chief executive officer Jay Rodriguez has said the truck left Miami about 4 a.m. that Sunday.