Yup!Of all things, I had an adult male rat snake (amelanistic black) kill the proven-breeder female (also an amel. black rat snake) shortly after they were introduced. Both snakes were very well-fed- not that day, & had scent of prey washed off as a precaution. Everything seemed fine- I watched for a while, but when I left the room for a short time, that's when it happened. She was half-swallowed when I returned, & could not be revived.
He was especially pretty (red-orange pattern on cream colors) but needless to say, he never saw another mate- at least not while he was under my roof. Jerk!