How many times was Sgt. Bruce Porthero shot in The Other Wes Moore?

Overall, Sergeant Prothero was shot three times; he later died of his injuries. He was off-duty on that terrible day when he responded to a jewelry store robbery in Baltimore. Sgt. Prothero gave chase to the four robbers—among whom were the other Wes Moore and his brother Tony—before he was shot point blank in the face.
To avoid the death penalty, Tony Moore pled guilty to the shooting, for which he was sentenced to life in prison. As for Wes, he claimed that he wasn't at the crime scene, but he was later found guilty of first-degree felony murder and, like his brother, was sentenced to life in prison.
When the author Wes Moore read about the story, he was fascinated at how someone with the exact same name growing up in a similar neighborhood could end up following such a radically different path in life. And so he reached out to the other Wes Moore, writing him a letter that would change both their lives forever.