Keep him inside= no problem. You are the pet owner. It is 100% YOUR responsibility to keep your pet under your control/ on your property.
Your neighbor committed no crime in trapping a roaming animal on his property. YOU committed a crime of trespassing in "hopping the fence".
QUOTE="monika...
Don't forget:
Fleas, tick Bourne diseases, fights with other cats, FELV, FIV, traps set by neighbors who do not have an affinity for you cat spraying and pooping all over their property, coyotes, cars...it goes on and on. Too many cat parents think it's "cruel" to keep a cat inside. I ask you--...