Chuck Easttom has 16+ years in the IT industry and has been an expert witness on several computer-related cases. He is the author of 10 other computer-science books, including two textbooks on computer security. He was also one of the subject-matter experts who helped to create CompTIA’s Security+ certification test. He has been a frequent guest speaker on computer security at various computer groups and campuses, including Harvard and Columbia. He holds more than a dozen computer-industry certifications. Jeff Taylor, a McKinney, Texas, police detective, began his law-enforcement career in 1982. He is currently assigned to the Criminal Investigations unit, where he specializes in white-collar crimes. In 2003, Detective Taylor became certified in the recovery of computer-forensic evidence. He uses various computer-software systems, including EnCase, Helix, and I-Look. He has received training and certifications from the FBI, Cyber Evidence Inc., the National White Collar Crime Center, and the High Intensity Drug Trafficking Area (HIDTA) task force. Detective Taylor is on the instructor staff at the Collin County Law Enforcement Academy, where he teaches a course on electronic crime scene investigations.