San Francisco Police Department Recruit Officer Ricky Williams isn't even working the city's mean streets yet, but earlier this month he still managed to save a life and garner effusive praise from SF's top cop.

According to the SFPD, Williams is currently a member of SFPD's 247th Academy Class, which won't have its graduation until January of 2016. On Sunday December 13 at around 4 p.m., Williams told media during a press event held Monday afternoon, he was off-duty and shopping for "supplies for his class" with his best friend and girlfriend at the Bayfair Mall in San Leandro.

While the trio were in the parking lot, Williams' girlfriend "pointed out a hysterical woman screaming with a limp baby in her arms," the Chron reports.

“She’s like, ‘Oh my god. Oh my god. My baby is not breathing,” Williams said at the press event. “His lips were very blue. His tongue was blue, not breathing at all."

The mother, who has not been identified, handed her "lifeless" two-month-old baby over to Williams, SFPD says in a statement. He hopped into the back seat of the woman's car and "immediately began CPR chest compressions while the mother performed rescue breathing."

"I grabbed the baby in the back seat of her car and started my compressions, which I learned in the academy," Williams said.

“I was not sure if it’ll work,” Williams said. “They tell us it will work, but you are just not sure...In a high-stress situation, I couldn’t fall back on anything but my training here."

After a few cycles of CPR, "the baby finally started showing signs of life and began crying," SFPD says.

Meanwhile, Williams' friend had called 911, and soon thereafter "San Leandro Police arrived along with paramedics, who took the infant into their care," police say.

The baby, which the Chron reports has "a history of heart problems," was transported to Children's Hospital in Oakland. According to KRON4, "the baby is expected to be just fine."

Williams, a 25-year-old Oakland native, is also an expectant father, quickly downplays the suggestion that he's a hero, saying that saving the baby was all in a day's work.

"I knew nothing else but what I was taught at that moment. I couldn't freak out, I would say numb, just kind of focused. I'm just glad that I acted accordingly and I did what it is that I signed up to do, which is help people out," he says, but SFPD Chief Greg Suhr is still eager to praise his actions.

"Recruit Officer Williams' immediate response is exactly what I expect from our officers," Suhr said in a statement, "and those training to become San Francisco's finest. Recruit Williams applied his training and his prompt action helped save this infant's life."

"It is our sworn duty to help people," Suhr says. "Clearly we chose wisely in hiring Recruit Officer Williams. His conduct exemplified the best in all of us."