SAN LEANDRO (KPIX 5) — A woman was brutally beaten while walking home from the Bay Fair BART station in San Leandro, according to the Alameda County Sheriff’s Department.

Linda Tweedle is determined to find out who robbed and viciously beat her daughter.

READ MORE: COVID: Fisherman's Wharf In-and-Out Burger Location Temporarily Closed for Not Checking Vax Status

“Sherri is not even five feet tall, so for him to come and attack her from behind like that it’s unspeakable,” Linda Tweedle, the victim’s mother told KPIX 5.

48-year-old Sherri now has three fractures, swelling, and bruises across her face.

Alameda County Sheriff’s office says the robber pistol whipped Sheri Friday evening as she walked home from the Bay Fair BART station after having dinner with friends.

It happened near 159th avenue and 14th street. The suspect ran off with Sherri’s backpack and phone.

“It was bleeding profusely. It wouldn’t stop. It’s horrifying to see your child like that,” Linda said.

Detectives say this robbery is one of the most brutal they’ve seen in years.

READ MORE: Tearful Memories Linger 30 Years After Deadly Oakland Hills Firestorm

“This one is a little more personal to us that there is a suspect out there operating like this,” Sgt. Ray Kelly with the Alameda County Sheriff’s office said.

Now, the department is beefing up patrols in the area ahead of holiday shopping, when they say street robberies go up.

“We are asking people to be vigilant. Be aware of your surroundings, and if you feel that something is going on, lease get on your phone call 911,” Kelly said.

Detectives haven’t identified the suspect in Friday’s beating, but they do have leads, and are asking anyone who may have information on the case to come forward.

“Find this coward so we don’t have to worry about this happening to someone else,” Sherri said.

A GoFundMe page has been set up to help with Sherri’s medical bills.

MORE NEWS: UPDATE: Phish Fan Injured After Being Fallen On at SF Chase Center Concert Describes Brush with Death