Saavedra, who operates an animal disposal service, said Thursday that personal problems caused him to get behind on his work.
"So I know I did wrong, but we're remedying the problem," he said.
Saavedra says he took the carcasses to an animal interment site -- where Sally, a 44-year-old zoo rhino euthanized in December, was laid to rest -- and that authorities watched.
Saavedra faces a fine and jail time.