Is it possible for a puppy to die in its cage?

My married sister got a little puppy poodle in 2013. a few months later she got a divorce. a week after she left the house she moved into her 300lbs of muscle boyfriends apartment. she brought the dog along. the dog was quite annoying. one day my sisters kids (ages 5,7,11) called my mom (the grandma) saying the dog has been missing for a week. My mom then called my sister to ask her about it. she said the 6 month old puppy died in a cage. it somehow got out of the metal cage but got stuck on a lever and it peirced into its lung and it died. so they took the dog to a field and secretly buried it.. and told no one. i mean, that sounds super fishy.