At 74, Agnes had seen her share of neighbor disputes, but nothing like this. Her cherished backyard pond—dug by her great-grandfather and home to rare fish—was destroyed while she was away by her grumpy neighbor, Derek.

Claiming the pond was a nuisance, Derek hired a crew to fill it in. But Agnes wasn’t just a sweet grandma with a cookie recipe—she had a bird cam, legal records of the protected fish, and a lawyer grandson.