McCarthy was a 52-year-old former occupational therapist who was convicted in 1997 of murdering her elderly neighbor, a retired professor, in a botched robbery.
Texas continues to lead the nation in executions though last year Texas executed more people than people sentenced to death for an eighth year in a row.
Here is the most striking statistic: just four states — Texas, Oklahoma, Mississippi and Arizona — accounted for three quarters of all U.S. executions in 2012.
Source: CNN
