In a significant development in the Nancy Guthrie kidnapping case, the FBI has released a detailed description of the suspect and doubled the reward for information leading to her recovery or the arrest of the suspect to $100,000. According to NBC News World, the suspect is described as a male, approximately 5'9" to 5'10" with an average build, and was seen wearing a black 25-liter Ozark Trail hiker pack backpack. This description was derived from forensic analysis of doorbell camera footage, as reported by CBS News. The FBI has also received over 13,000 tips since February 1st, the day Guthrie was reported missing, and continues to appeal for more information from the public, as noted by KTVU FOX 2 San Francisco.