Weaponized Drones, Counter-UAS and Gangs: Brazil's Public-Safety Regulatory Dilemma
A grounded look at Brazil's push to authorize armed drones for police, the counter-UAS scramble already underway, and the criminal use of UAS by organized crime — no hype, just the regulatory gaps and the C-UAS tech trying to fill them.
In October 2024, a DJI Matrice rigged with an improvised explosive device fell into the backyard of a house in Pedro Leopoldo, Minas Gerais. It didn't detonate. But it did drag the conversation about weaponized drones in Brazil back into the open and made clear that the criminal use of unmanned aircraft is no longer a hypothetical. The legal framework, meanwhile, is still trying to catch up.
Across 2024 and 2025, the criminal use of drones climbed the public-safety agenda in Brazil, while several bills started to address both state use of these aircraft and criminal liability for their misuse.
In the Chamber of Deputies, Complementary Bill 36/2025 sets out rules for the use of UAVs, remotely piloted aircraft and drones by public-safety agencies and the Armed Forces. The version approved in committee allows, in exceptional situations, the use of weapons mounted on drones, and lays out rules for police operations, data protection and the neutralization of aircraft used in crimes.
In the Senate, PL 3,611/2021 also covers drone use by public-safety agencies and is still moving through the Public Safety Committee. Back in the Chamber, PL 2,798/2026 proposes tougher sentences for crimes committed with drones and would classify armed or damage-modified drones as restricted or prohibited firearms.
So the picture doesn't hinge on a single bill. Brazil's legislative debate spans at least four fronts: regulating state use of drones, authorizing weapon payloads, cracking down on criminal use, and defining operator liability.
What weaponized drones mean in Brazil and what PL 128/2022 would change
Weaponized drones are unmanned aircraft (UAS) fitted with kinetic, chemical or electronic payloads capable of neutralizing a target. That can range from stun grenades and live ammunition to dispersal systems and onboard jammers. In Brazil, their use by government agents sits in a tangled regulatory zone: ANAC (the Brazilian civil aviation authority) handles civil operation, DECEA controls the airspace, and armed use by police forces requires its own specific rules.
PL 128/2022 tries to plug part of that gap. It authorizes use by the Federal Police, Federal Highway Police, state civil and military police, the National Force and the Armed Forces — conditioned on use-of-force protocols and certified training. What it doesn't cover: manufacturer standards, technical homologation, or interoperability with air-traffic systems like UTM. Even if approved, it would still depend on further regulation and operating procedures to actually work in the field.
Gangs and the new aerial theater of organized crime
Long before any specific legal framework, the problem was already showing up in police operations. Reports from the Brazilian Public Security Forum and seizures documented by Rio's Civil Police point to drones adapted for reconnaissance, cargo transport and attacks against rival groups.
The pattern involves drones from different classes and manufacturers, retrofitted with structures to carry homemade grenades, explosive payloads or drug packages destined for prisons. A February 2025 operation in Complexo da Maré reportedly resulted in the seizure of 14 modified UAS in a single incursion.
The roles assigned to these aircraft include:
- Real-time aerial reconnaissance of police operations, including FPV drones tracking armored vehicles;
- Attacks on police positions and rival communities;
- Prison-smuggling logistics, primarily targeting federal and state maximum-security units;
- Neutralization of police drones through intentional collisions or improvised signal-jamming techniques.
The counter-drone response: what Brazil's Civil Police is already flying against
While the bill grinds through committee, state forces have been sourcing C-UAS (Counter-Unmanned Aircraft Systems) tech on their own. Rio's Civil Police acquired RF-detection systems and portable jammers; São Paulo followed a similar path through a partnership with the state Military Police.
In practice, a C-UAS architecture works in three layers: detection, identification and neutralization. Detection can mix radar, RF sensing, acoustic sensors and optical systems. Identification reads the protocol signature — DJI OcuSync, Lightbridge, generic Wi-Fi. Neutralization can involve jamming, spoofing, net capture or kinetic engagement.
The catch is both legal and operational. Jamming is illegal for civilians in Brazil and remains legally murky when used by police, because Anatel (the national telecoms regulator) has yet to publish specific rules for public-safety use. Firing a jammer at a hostile aircraft therefore demands clear protocols — otherwise you risk knocking out legitimate communications along with the threat.
Remote ID and UTM: the missing link Brazil hasn't closed
Identifying unmanned aircraft is one of the pillars of any serious counter-drone architecture. In civil operations, being able to tell an authorized flight from a rogue one can be the difference between a measured response and a costly mistake.
Brazil's regulatory picture did move forward in 2026. DECEA rolled out a new edition of ICA 100-40, which consolidates the rules for unmanned aircraft and airspace access, and also published ICA 100-48, specific to Unmanned Traffic Management (UTM).
That doesn't mean the identification problem is solved. C-UAS systems still need to fuse traffic data, sensor feeds and operational intelligence to make a call on any aircraft flying in a sensitive area or behaving oddly.
In urban environments and near airports, that distinction matters even more. Any response against an unauthorized aircraft has to weigh the potential threat against other aircraft in the area, people on the ground, critical infrastructure and legitimate operations nearby.
The regulatory vacuum, in four points
The bottleneck isn't just PL 128/2022. It's also the lack of coordination between the agencies involved. For armed drone use in Brazil to move forward under any real control, four things need to be sorted out:
- Technical homologation: defining how armed UAS would be evaluated by ANAC or the relevant authority, so each force doesn't end up buying gear on its own terms.
- Anatel regulation: setting the conditions for jamming and spoofing by security forces, with authorized bands and interference-mitigation protocols.
- DECEA procedures: rules for C-UAS operations in controlled airspace and near airports.
- Chain of custody and accountability: who answers for a lethal-use decision — the operator, the commander, or another responsible authority.
What to watch in the coming months
How PL 128/2022 progresses — and any regulations that follow — will be one of the main things to track. The core question isn't just whether to allow public forces to fly drones, but what safeguards, training, auditing and operational limits come attached.
It'll also be worth watching C-UAS procurement tenders, public consultations on Remote ID, and legal opinions on jamming by security agencies. Buying technology without a clear operational baseline is a recipe for interoperability gaps, courtroom challenges and risks to civil aviation.
The debate over weaponized drones in Brazil is also about cost and technical capacity. Advanced detection and neutralization systems can demand serious investment, continuous training and specialized maintenance. A coordinated federal policy is likely to hold up better than a patchwork of isolated state purchases with no common standard.
Final thoughts
Brazil is debating weaponized drones after the problem has already landed in the middle of security operations. Gangs can adapt off-the-shelf commercial aircraft; police have to respond with equipment, protocols and a legal footing that actually holds up.
PL 128/2022 can fill part of the gap, but on its own it doesn't answer technical homologation, interoperability with air-traffic systems, remote identification or accountability for use of force. An effective C-UAS response depends on Congress, ANAC, Anatel, DECEA and the security forces actually rowing in the same direction.
Without that alignment, Brazil risks pairing advanced technology with half-written rules. The likely result: legal challenges, interference with manned aircraft, and operations that are almost impossible to audit. The conversation needs to move — quickly, but with technical rigor and institutional oversight.