State of Washington v. Casey Dullea Peppin

Court of Appeals of Washington·Decided April 9, 2015·No. 32058-8·Published

Opinion

FILED

APRIL 9, 2015

In the Office of the Clerk of Court W A State Court of Appeals, Division III

IN THE COURT OF APPEALS OF THE STATE OF WASHINGTON DIVISION THREE

STATE OF WASHINGTON, ) No. 32058-8-III )

Respondent, )

)

V. ) OPINION PUBLISHED ) IN PART

CASEY D. PEPPIN, )

)

Appellant. )

LAWRENCE-BERREY, J. - A trial court found Casey Peppin guilty of three counts of first degree possession of depictions of a minor engaged in sexually explicit conduct. In this appeal, Mr. Peppin challenges the trial court's denial of his motion to suppress the images of child pornography found on his computer. He raises an issue of first impression in Washington. He contends that law enforcement's use of enhanced peer to peer file sharing software to remotely access the shared files on his computer was illegal under the Fourth Amendment of the United States Constitution and article I, section 7 of the Washington State Constitution. He maintains that such conduct represents an intrusion into his private affairs because he had a reasonable expectation of privacy in his personal computer files. We hold that Mr. Peppin did not have a constitutionally

No. 32058-8-III State v. Peppin

protected privacy right in the image files he shared with the public. We therefore affirm his convictions.

FACTS

On December 29,2011, Spokane Detective Brian Cestnik conducted an online investigation of the Gnutella network to identifY persons possessing and sharing child pornography. Using peer to peer software called Round Up version 1.5.3, Detective Cestnik found child pornography on Mr. Peppin's computer in a shared folder.

Detective Cestnik's report of the investigation explains peer to peer file sharing.

According to his report, peer to peer file sharing is a method of Internet communication that allows users to share digital files. User computers link together to form a network; the network allows direct transfer of shared files from one user to another. Peer to peer software applications allow users to set up and share files on the network with others using compatible peer to peer software. For instance, LimeWire and Shareaza are software applications that allow users to share files over the Gnutella network.

To gain access to shared files, a user must first download peer to peer software, which can be found on the Internet. Then, the user opens the peer to peer software on his or her computer and conducts a keyword search for files that are currently being shared on the network. The results are displayed and the user selects a file for download. The

No. 32058-8-III State v. Peppin

downloaded file is transferred through a direct connection between the computer wishing to share the file and the user's computer requesting the file. The Gnutella network gives users the ability to see a list of all files that are available for sharing on a particular computer.

For example, a person interested in obtaining child pornographic images opens the peer to peer software application on his or her computer and conducts a file search using keyword terms such as "preteen sex." The search is sent out over the network of computers to those using compatible peer to peer software. The results of the search are returned and displayed on the user's computer. The user selects the file he or she wishes to download. The file is then downloaded directly from the host computer onto the user's computer. The downloaded file is stored on the user's computer until moved or deleted.

When more than one host computer offers the file that is requested, peer to peer software allows the user to download different parts of the file from different computers. This speeds up the time it takes to download a file. For instance, a person using Shareaza to download an image may actually receive parts of the image from multiple computers. However, often a user downloading an image file receives the entire image from one computer.

No. 32058-8-III State v. Peppin

Every file shared on the Gnutella network has a unique identifier based on a Secure Hash Algorithm (SHAl) value, sometimes called a hash value. The SHAI value acts as a fingerprint for that file. It is computationally infeasible for two files with different content to have the same SHAI hash value.

A peer to peer file transfer is assisted by reference to an Internet Protocol (IP)

address. In general, the numeric IP address is unique to a particular computer during an online Internet session. The IP address provides a location, making it possible for data to be transferred between computers. Investigators can search public records on the Internet to determine which Internet provider is assigned the IP address. Investigators can contact the Internet provider and gain information about the user based on the IP address assigned to the computer.

Detective Cestnik searched the Gnutella network for "pthc," the commonly used term for preteen hard core Internet pornography. Clerk's Papers (CP) at 17. The results indicated that images matching the search terms could be found on a host computer with an IP address linked to Spokane. Detective Cestnik's check of the IP address through two different Internet search engines confirmed that the IP address was in Spokane and that Qwest Communications was the provider.

No. 32058-8-III State v. Peppin

Detective Cestnik used the IP address to access the host computer. The host computer was configured to allow browsing of its shared folder. Detective Cestnik viewed the contents of the folder and noticed four files that appeared to be child pornography. Detective Cestnik successfully downloaded three files from the host computer before it stopped. After reviewing the videos in the files, he determined that each video constituted possession or dealing in depictions of minors engaged in sexually explicit conduct.

Detective Cestnik presented Qwest Communications with a search warrant requesting information on the IP address for the host computer. Qwest Communications advised Detective Cestnik that the IP address was connected to Mr. Peppin and provided Mr. Peppin's address.

Detective Cestnik then obtained a search warrant for Mr. Peppin's computer. A complete forensic investigation uncovered over 100 videos of what appeared to be minors engaged in sexually explicit conduct. The State charged Mr. Peppin by amended information with three counts of first degree possession of depictions of minors engaged in sexually explicit conduct and one count of first degree dealing in depictions of minors engaged in sexually explicit conduct.

No. 32058-8-III State v. Peppin

Mr. Peppin moved to suppress the computer files downloaded by Detective Cestnik during his Internet search. He maintained that law enforcement's access and download of his computer files via the Internet was an intrusion into his private affairs and an unlawful warrantless search. At the suppression hearing, Mr. Peppin also argued that the use of enhanced peer to peer software provided information to law enforcement that was not available to the general public.

At the hearing, in addition to the report provided by Detective Cestnik, the court heard from Mr. Peppin's expert, Jennifer McCamm. Ms. McCamm worked as a computer system administrator, with some background in computer forensics. Ms. McCamm testified that the purpose of peer to peer file sharing programs is to share files.

She explained that sharing is inherent in these programs and a user must change the default setting if they desire not to share files.

Ms. McCamm said that she had not seen the law enforcement peer to peer software. Still, she testified that law enforcement uses an enhanced version of peer to peer software that is different from what is available to the general public. As the biggest difference, she noted that law enforcement software has features that make searching the network easier. For instance, law enforcement software can search all user files on the Gnutella network, regardless of what client interface is being used. Also, the software

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