I may be wrong, but I thought the legal definition of a straw purchase was to buy one for someone who could not legally purchase it themselves.
Common misconception. Buying for a prohibited person is only one possible element of a straw purchase. Buying a gun on behalf of anyone can be a straw purchase, regardless of whether or not they are prohibited.
Say you and I are not legally prohibited from purchasing firearms. If I can get a gun cheaper at Tinker AFB, you give me the money, and I go buy it for you, then we have participated in a straw purchase.
What I'm interested in is how the buyer in the OP transferred the Glock to his uncle out of state? Did he go through an FFL? If not, maybe they just piled on the charges to see what would stick.
(Edit: Just found the Supreme Court Briefs...he did use a dealer to transfer it but the damming evidence is that his uncle paid him in advance, with a check and even wrote "Glock 19" in the memo section of the check, LOL. The whole thing came to light when the man became a suspect in a bank robbery...DOH!)
iN 2009, PETITIONER
SPOKE TO HIS UNCLE, ANGEL ALVAREZ, A RESIDENT OF
PENNSYLVANIA, ABOUT ALVAREZ’S DESIRE TO PURCHASE A
GLOCK 19 HANDGUN. iBID.; J.a. 23A-24A, 26A. PETITIONER
OFFERED TO PURCHASE THE GUN FOR ALVAREZ FROM TOWN
POLICE SUPPLY, A FEDERAL FIREARMS LICENSED DEALER IN
COLLINSVILLE, VIRGINIA THAT OFFERED DISCOUNTS TO POLICE
OFFICERS. PET. aPP. 3A; J.a. 24A. ON NOVEMBER 15,
2009, ALVAREZ SENT PETITIONER A CHECK FOR $400 WITH
“GLOCK 19 HANDGUN” WRITTEN IN THE MEMO LINE. PET.
aPP. 3A; J.a. 27A.
ON NOVEMBER 17, 2009, PETITIONER PURCHASED A
GLOCK 19 HANDGUN AND OTHER ITEMS WITH $2000 IN CASH
FROM tOWN POLICE sUPPLY, USING HIS EXPIRED POLICE
IDENTIFICATION CREDENTIAL TO OBTAIN THE DISCOUNT. PET.
aPP. 3A; SEE J.a. 30A-31A