Razorback

Jake Cullen (Bill Kerr) is babysitting his grandson at his house in the Australian outback when a massive razorback boar attacks him, smashing through his house and carrying off his grandson to devour alive. Jake is accused of murdering the child and while his account of the events are met with considerable scepticism, he is ultimately acquitted due to lack of evidence for accountability. The event destroys his credibility and reputation however, and he vows revenge on the boar.