Say that Reuven is at the batting cages. After the machine turns off, Shimon flips it back on without Reuven knowing. A ball whacks Reuven in the head. Is Shimon liable for the resulting death?
What about an extreme case, in which Shimon programmed a robot to turn on the batting cage for him?
The Gemara in Makkos 8a notes that for a murder that is a gerama it is a machlokes whether one is liable, but a gerama of a gerama is patur according to everyone. How far removed does flipping on the circuit make one? Is that still considered direct enough?