true or false In United States v$.$ Safavian, $528$ F$\mathrm{.}3$d $957($D$.$C$.$ Cir. $2008),$ the D$.$C$.$ Circuit Court of Appeals remanded the case and order a new trial. One of the reasons the court reversed the conviction and order a new trial was that the trial court erred by precluding the defense from call an expert witness who was going to testify that an individual is not doing business with GSA until a contract is awarded.