This Thursday, March 16, 2017 photo released by the Bannock County Sheriff's Office shows a cyanide device in Pocatello, Idaho, The cyanide device, called M-44, is spring-activated and shoots poison that is meant to kill predators. The U.S. Department of Agriculture released a statement Friday, March 17, 2017, confirming that workers placed the device that activated Thursday which resulted in the death of a 3-year-old Lab named Casey. Bannock County Sheriff Lorin Nielsen says a 14-year-old boy was taken to a hospital to be tested for cyanide poisoning but was not seriously injured and was released. (Bannock County Sheriff's Office via AP)

BOISE, Idaho (AP) — An Idaho couple who says their son was sprayed with cyanide by a predator-killing trap that federal workers mistakenly placed on U.S. land near their home has sued the government.

Mark and Theresa Mansfield filed the lawsuit this week seeking more than $150,000 in damages.

Last year, their then-14-year-old son and his dog encountered the trap that the U.S. Department of Agriculture placed to kill coyotes.

The lawsuit says it killed the dog and knocked down the boy, who still has headaches. It came after the government said it had stopped using the devices on federal lands in Idaho.

U.S. officials said after the incident that they would expand a review of cyanide traps, which are still used in other states. They also issued guidelines requiring federal workers to notify nearby residents of their placement.