Final answer:
The owner of a dangerous dog that injures or kills without provocation can be held legally liable and may face serious consequences such as fines, legal prosecution or a warning, depending on local laws.
Step-by-step explanation:
The question asks about the consequences faced by the owner of a dangerous dog that injures or kills without provocation. The legal responsibility of a pet owner is to ensure that their pet does not pose a danger to others. In most jurisdictions, if a dog causes harm, especially without provocation, the owner can be held liable. The range of possible consequences varies depending on local laws, but they can include fines, legal prosecution, and in some cases, being given a warning. An owner's negligence or failure to restrain a potentially dangerous dog can result in serious legal consequences.
A counter example situation is provided in which someone who knows in advance the actions of their dog and still allows it to cause harm is clearly responsible. This parallels the legal concept that pet owners are responsible for the actions of their pets. The mention of an unrestrained, untrained dog causing trouble due to the owner's inaction or negligence further highlights the owner's responsibility and potential legal repercussions.