A 23-year-old South Carolina woman has been arrested after authorities stated she intentionally set her car on fire while her 14-month-old son sat inside the vehicle. According to theColumbia Police Department,Caylin Allise Watson was charged with attempted murder, first-degree arson, third-degree arson, and abuse of great bodily injury. Investigators say that the car was parked on Mile Marker 1 on I-126 West just after 1:30 in the afternoon on Sunday.