After weeks of limited progress in the disappearance of Nancy Guthrie, investigators with the Pima County Sheriff’s Department began reviewing records that had initially appeared unrelated to the case. Detectives had already analyzed digital data, interviewed witnesses, and reviewed surveillance footage, yet several gaps in the timeline of Nancy’s disappearance remained unresolved. During a financial audit connected to individuals close to the investigation, officials reportedly discovered a document that had previously gone unnoticed. It was an invoice.
At first, the record looked like a routine service receipt issued by a local waste-management contractor. However, certain details quickly drew investigators’ attention. The service request had been placed at 4:03 a.m., an unusually early hour for the type of work listed. Even more concerning was the location. The address on the invoice matched the residence of Tommaso Cioni. The document also showed the service cost nearly $2,000 and described the job as an emergency septic tank extraction. Detectives noted that septic pumping is typically scheduled during normal daytime hours and rarely requires urgent overnight service unless there is a major plumbing failure.
Investigators contacted the service provider to confirm the record. Workers who responded to the call told authorities they had been asked to pump and completely empty the septic tank. The work was completed before sunrise. When detectives compared the service time with the timeline of Nancy’s disappearance, the overnight pumping raised new questions. Authorities later obtained a warrant to examine the septic system. Although the tank had already been emptied weeks earlier, forensic teams conducted a careful search of nearby pipes, drainage lines, and surrounding soil. Using specialized filtration equipment, investigators collected microscopic fragments now undergoing laboratory analysis as the investigation continues.
