In April 2012, a Kansas SWAT team raided the home of Robert and Addie Harte, their 7-year-old daughter and their 13-year-old son. The couple, both former CIA analysts, awoke to pounding at the door. The family was then held at gunpoint for more than two hours while the police searched their home. They found no evidence of any criminal activity. The investigation leading to the raid began ... when Robert Harte and his son went to a gardening store to purchase supplies to grow hydroponic tomatoes. The Johnson County Sheriff's Department began [sending] deputies out to sort through the family's garbage. The deputies repeatedly found saturated plant material" that they thought could possibly be marijuana. On two occasions, a drug testing field kit inexplicably indicated the presence of THC, the active drug in marijuana. Lab tests would later reveal that the "saturated plant material" was actually loose-leaf tea. Why did the field tests come up positive for pot? These tests come up positive whenever the police need them to. The tests [can] be manipulated to generate positive results. The Hartes wanted to know what happened. They spent more than $25,000 in legal fees just to learn why the sheriff had sent a SWAT team into their home. Once they finally had that information, the Hartes filed a lawsuit. U.S. District Court Judge John W. Lungstrum dismissed every one of the Hartes's claims, [and] ruled that the police were under no obligation to know that drug testing field kits are inaccurate.