Leading Retailer The Wet Seal Chooses Guidance Software's EnCase eDiscovery

PRESS RELEASE

PASADENA, Calif., Jan 21, 2009 - Guidance Software Inc. (NASDAQ: GUID), the World Leader in Digital Investigations(tm), today announced that The Wet Seal, Inc., a leading specialty retailer of fashionable and contemporary apparel and accessory items, operating 500 stores in 47 states, the District of Columbia and Puerto Rico, has selected Guidance Software's EnCase(r) eDiscovery and EnCase(r) Enterprise for eDiscovery and internal investigations.

"We are delighted that Wet Seal has selected Guidance Software," said Victor Limongelli, President and CEO for Guidance Software. "They now have the support required to effectively gather and preserve electronically stored information and conduct efficient eDiscovery, comprehensive data audits, and thorough internal investigations."

Guidance Software's EnCase platform provides the foundation for enterprises and government agencies to conduct thorough, network-enabled, and court-validated digital investigations, such as responding to eDiscovery requests, conducting internal investigations, responding to regulatory inquiries or performing data and compliance auditing, while maintaining the integrity of the data.

Guidance Software received the highest ranking (Top 5 Provider) in the eDiscovery Software Providers Category of Socha-Gelbmann's 2008 Electronic Discovery Survey. The company also received two 2008 awards from Law Technology News for EnCase eDiscovery's collection and processing capabilities.

About Guidance Software (GUID)

Guidance Software is recognized worldwide as the industry leader in digital investigative solutions. Its EnCase(r) platform provides the foundation for government, corporate and law enforcement organizations to conduct thorough, network-enabled, and court-validated computer investigations of any kind, such as responding to eDiscovery requests, conducting internal investigations, responding to regulatory inquiries or performing data and compliance auditing - all while maintaining the integrity of the data. There are more than 30,000 licensed users of the EnCase technology worldwide, and thousands attend Guidance Software's renowned training programs annually. Validated by numerous courts, corporate legal departments, government agencies and law enforcement organizations worldwide, EnCase has been honored with industry awards and recognition from eWEEK, SC Magazine, Network Computing, and the Socha-Gelbmann survey. For more information about Guidance Software, visit www.guidancesoftware.com.