Lacey Spears: "Losing Garnett is the worst thing that has happened to me"
Lacey Spears is accused of murdering her 5-year-old son, Garnett. In an exclusive interview with "48 Hours" correspondent Troy Roberts, she talks about losing her son. For more, watch "A Mother Accused," Saturday, Sept. 17 at 9 p.m. ET/PT on CBS.