If the ruling is that these trade-secrets were stolen goods, I'd be willing to bet that these three guys could refuse to answer any questions, by invoking the 5th Amendment, since they would incriminate themselves by saying anything.
These three guys could refuse to answer any questions, by invoking the 9th Amendment.
( z1 possible :ARG1 ( z2 refuse :ARG0 ( z3 guy :quant 3 :mod ( z4 this ) ) :ARG1 ( z5 answer :ARG0 z3 :ARG1 ( z6 thing :ARG1-of ( z7 question ) :mod ( z8 any ) ) ) :manner ( z9 invoke :ARG0 z3 :ARG1 ( z10 law :name ( z11 name :op "9th" :op "Amendment" ) ) ) ) )