063212P.pdf   01/24/2008  USA  v.  Stephen Gill, et al
   U.S. Court of Appeals Case No:  06-3212
   U.S. District Court for the Southern District of Iowa - Des Moines   
   [PUBLISHED] [Melloy, Author, with Riley and Hansen, Circuit Judges]
   Criminal case - Criminal law. Based on the totality of the
   circumstances, there was reasonable suspicion to expand the scope of the
   traffic stop to include an investigation into whether the defendants were
   transporting contraband; asking questions and seeking to obtain consent
   to search the defendants' truck were reasonable and permissible methods
   of continuing the investigation and did not unduly prolong the
   investigation; defendant Riley was not unlawfully detained at the time she
   consented to a search of the truck and her consent was voluntary; district
   court did not abuse its discretion when it declined to reopen the record on
   the motion to suppress to admit evidence of polygraph testing as the
   evidence would have been of limited probative value; no error in
   admitting testimony from a DEA agent concerning the link between
   firearms possession and drug distribution as it assisted the jury in
   understanding the business of drug trafficking; district court did not err 
   in rejecting defendant Gill's proposed instruction on the definition of
   reasonable doubt to be applied in circumstantial evidence cases;
   instructions on defendant Gill's firearm offense did not amend the
   indictment and the instructions, while erroneous, did not require reversal
   because they did not affect Gill's substantial rights; evidence was
   sufficient to support conviction for carrying a firearm while trafficking.