Florida Highway Patrol arrests suspect in Manatee County for theft and illegal possession of radiological device
Bradenton, Florida – A 24-year-old Bradenton man has been arrested following a Florida Highway Patrol investigation into the theft and illegal possession of a radiological device used in construction testing, authorities announced.
Marco Antonio Benitez Jr. was taken into custody on May 28, 2026, after investigators linked him to the theft of a Moisture Density Gauge valued between $10,000 and $20,000. The device, which contains a controlled radioactive isotope of cesium-137, is used in construction and engineering work to measure soil and asphalt density.
Officials said the gauge is a highly regulated piece of equipment due to the risks associated with its radioactive components. If damaged or improperly handled, it can expose individuals to radiation that may cause serious health issues. Because of its potential danger and misuse, only licensed operators approved by the Florida Department of Health are legally permitted to possess or operate such devices.
According to investigators, the case began on May 26 when the Florida Highway Patrol’s Bureau of Criminal Investigations and Intelligence (BCII) received a tip about a private sale listing on Facebook Marketplace. The listing reportedly advertised the Moisture Density Gauge and was connected to Benitez.
The investigation quickly escalated as multiple specialized units joined the case, including BCII, the Criminal Interdiction Unit (CIU), and the Preventative Radiological Nuclear Detection (PRND) team. Troopers coordinated a controlled purchase attempt, arranging to meet the suspect in Bradenton.
However, when Benitez failed to appear at the agreed location and time, law enforcement took additional steps. State Troopers went to his residence, where they conducted an external radiation detection screening. The equipment reportedly registered an industrial-level alert, confirming the presence of radioactive material inside the home.
PRND personnel later entered and located the Moisture Density Gauge still intact, with its radioactive source undamaged. Authorities immediately secured the device and transported it for evidence and safekeeping to prevent any potential risk to the public.
Officials emphasized that the safe recovery of the device was a critical outcome given the hazardous nature of its contents. Even though the gauge remained intact, authorities noted that mishandling such equipment can create serious safety concerns and requires specialized response teams trained in radiological detection.
Florida Highway Safety and Motor Vehicles Executive Director Dave Kerner praised the coordinated effort among multiple law enforcement divisions.
“The Florida Highway Patrol is home to some of the most sophisticated and technically experienced criminal investigators. Our Radiological and Nuclear Detection State Troopers are a vital component to our public safety mission,” said FLHSMV Executive Director Dave Kerner. “Their efforts, along with the efforts of BCII and CIU Troopers, led to this important arrest and Florida is safer as a result.”
Benitez has been charged with grand theft of property valued between $10,000 and $20,000 and possession of a controlled radiation device without a license. Additional court proceedings are expected as the case moves forward in the criminal justice system.
Authorities have not released further details about a possible motive but confirmed that the investigation began after the online listing was flagged and reported. Officials continue to remind the public that controlled industrial and radiological equipment should never be bought or sold through unverified private channels.
The case remains under review as investigators document evidence and prepare for prosecution.
