Roberta Alston was recovering from her injuries Wednesday.
Alston was hit from behind as she was about to enter her home in unincorporated Tustin at about 1:30 p.m. Tuesday. She had just withdrawn $2,400 from the bank.
"All of a sudden, 'Whack' behind my head, and I went down on the cement," said Alston.
"The suspect reached into her purse, removed the envelope containing the money and fled," said Orange County Sheriff's Spokesman Jim Amormino.
"I woke up, I was still lying face down on the cement," said Alston.
Alston's daughter found her mother unconscious and called 911.
Authorities say they're looking at surveillance video from the bank to see if the suspect or suspects may have been inside before following Alston home.
Alston says she remembers seeing a light-colored car with at least two people inside pull a quick U-turn in front of her house as she got out of her car to go inside. She hopes someone got a better look.
"Anybody that saw anything, in the parking lot, in the bank, anyplace, please come forward," said Alston.
Alston's family comes from a law enforcement background. She says she's usually very cautious, something authorities always warn people about, especially during the holidays.
"Be very aware of your surroundings, especially if you go to the bank or an ATM," said Amormino.
If you have information related to the case, contact Orange County Crime Stoppers at (855) TIP-OCCS.