Under city, county and state laws, dog owners can do jail time after dog attacks: Throughout the USA, the owners of pit bulls and other high-risk dogs face criminal charges after significant attacks, and those charges range from criminal negligence all the way to second degree murder. For example, in October 2013 two of the owners of a pit bull that severely mauled one of Mr. Phillips' 10-year-old clients were sentenced to 6 months in jail for criminal negligence, the maximum sentence under Louisiana law (read the articles, Woman sentenced 6 months after her dog attacks child, and Pit bull attack of girl leads to Roseland woman's conviction.) 

Causing the death of a person by a known vicious animal
Examples of criminal prosecutions
Death as first degree murder
Death as second degree murder
Felony conviction for mayhem where injury is especially serious
Felony or misdemeanor for injury by dog ordered or trained to fight, attack or kill
Felony or misdemeanor for using dog as deadly weapon
Manslaughter resulting from death during commision of misdemeanor per misdemeanor - manslaughter rule
Manslaughter resulting from death caused by negligence
Misdemeanor based on degree of injury inflicted by attacking dog
Misdemeanor for destruction of attacking dog needed as evidence
Misdemeanor to fail to quarantine or produce animal, or give information about animal
Defending a dog and its owner
Defending against criminal charges: case study of People v. Maureen Faibish
Defending against criminal charges: double jeopardy