One of my German shepherds pooped in the house today. vaping.
Na uh, not buying it. It's more likely that your GSD unlocked the doors, let him self out, used gloves to collect some poop and then he placed in the house to frame the cat. Unless you ...... him off. Then he's smart enough to poop in the house but it would be some place clever, like your pillow or in your shoes, or in your meatloaf. GSD's are geniuses.