What follows is an opinion from a United States Court of Appeals. Your task is to identify what party initiated the appeal. For cases with cross appeals or multiple docket numbers, if the opinion does not explicitly indicate which appeal was filed first, assumes that the first litigant listed as the "appellant" or "petitioner" was the first to file the appeal. In federal habeas corpus petitions, consider the prisoner to be the plaintiff.

Thomas WILLIS, Jr., and Albert Rance, Appellants, v. UNITED STATES of America, Appellee.
No. 22787.
United States Court of Appeals Fifth Circuit.
Dec. 16, 1966.
James R. Gillespie, San Antonio, Tex., for appellants.
Andrew L. Jefferson, Jr., Asst. U. S. Atty., Chief Crim. Section, Reese L. Harrison, Jr., Asst. U. S. Atty., Ernest Morgan, U. S. Atty., Western Dist. of Texas, San Antonio, Tex., for appellee.
Before TUTTLE, Chief Judge, and AINSWORTH and DYER, Circuit Judges.
PER CURIAM:
The appellants were convicted of unlawful importation and knowing concealment of heroin in violation of Title 21 U.S.C.A. § 174. The only error asserted is the denial by the District Court of the appellants’ motion to suppress evidence seized by customs officers in a search of appellants’ car at the time of their arrest six miles from the Mexican border occurring minutes after appellants’ re-entry into the United States. The evidence showed that the Customs Agent stationed at the border had reasonable cause to suspect that the appellants were bringing heroin into the United States in a manner contrary to law. He ordered a customs investigator to detain the car and its occupants if it left town. The investigator kept the appellants under constant surveillance except for a brief time when the car was out of sight. This was a valid border search. Valadez v. United States, 5 Cir. 1966, 358 F.2d 721. The requirement of “reasonable cause to suspect” is satisfied if it is shown that the officer who issues the order for the search is possessed of sufficient information to satisfy the test. Cf. Marsh and Martinez v. United States, 5 Cir. 1965, 344 F.2d 317.
The judgment of conviction is
Affirmed.

Question: What party initiated the appeal?
A. Original plaintiff
B. Original defendant
C. Federal agency representing plaintiff
D. Federal agency representing defendant
E. Intervenor
F. Not applicable
G. Not ascertained
Answer: