Zaki Davis (Mecklenburg County Jail). A 26-year-old North Carolina man will spend the rest of his days behind bars after he beat his girlfriend's 7-month-old son to death while she was at work. More from Law&Crime: 'People do it all the time': Mother justified 'jolting' her 1-week-old daughter like rag doll by saying she's 'not made of glass,' police say