A Texas forensic artist, Lois Gibson, has released an unofficial sketch of a suspect in the disappearance of Nancy Guthrie, a 84-year-old woman who went missing from her Tucson home on February 1. The FBI has expanded its search efforts into Texas with digital billboards and a $50,000 reward, as they investigate the case. Gibson, a retired Houston Police Department forensic artist, created the sketch based on surveillance images of a masked person of interest seen outside Guthrie's home. Gibson relied on the visible features, primarily the eyes and partial facial structure, to create the image. Gibson, a University of Texas alumna and the Guinness world record holder for "Most Successful Forensic Artist", has helped identify over 751 criminals. The FBI has posted digital billboards in Houston, Dallas, San Antonio, and El Paso featuring Nancy Guthrie's photo, identifying details, and an FBI tip line. Nancy Guthrie is described as 5 feet, 5 inches tall, about 150 pounds, with brown hair and blue eyes. Savannah Guthrie, Nancy's daughter and an American journalist, has shared several videos on social media since her mother's disappearance, shifting from direct pleas to heartfelt requests for help from the public. Savannah has also shared childhood videos and photos of their mother. The FBI has said it is unaware of any direct communication between the Guthrie family and suspected abductors.