"[The] FBI does not confirm or deny our use of specific investigative tools. However <…> we always adhere to the law, the Constitution, and Attorney General Guidelines for all investigative tools and techniques that we may use," the press officer said.
Earlier this week, media reported that over 50 US law enforcement agencies, including the FBI, have been using the Radar-R device, capable of shooting radio waves through walls and doors from up to 50 feet away.
Such devices, which have been in use for at least two years by the country's law enforcement agencies, also worry those who oppose police militarization, a hot topic after the riots in Ferguson.
According to a poll conducted by ICM Research exclusively for Sputnik news agency, 46 percent of US citizens are in favor of police officers carrying fewer weapons, while 48 percent believe that law enforcers should carry more military equipment.