Welterweight contender Karim Mayfield, 37 years old, was visibly shaken after finding out that his younger brother, 28-year-old Shaleem Tindle of Oakland, was the man fatally shot by BART police officers during a confrontation on Wednesday afternoon.

“My heart is aching right now, my little brother Shaleem was just murdered by Bart police in West Oakland yesterday,” Mayfield wrote on Thursday. "My Earth was shook before.”

According information obtained by the Mercury News, Tindle was shot by BART police across from the West Oakland station on the 1400 block of Seventh Street about 4:41 p.m. when he refused to drop a gun.

Another man, identified only as an Oakland resident, had been in a struggle with Tindle and was also wounded.

The paper reports that a woman who identified herself as Laquisha Stanley told reporters at the scene Wednesday night that Tindle had been arguing with the other man, whom she said was a friend of hers, and that Tindle was the one who shot her friend in the leg.

The pistol was recovered at the scene.

According to police, the officer who shot Mayfield's brother was wearing a body camera that captured what happened.

Mayfield snapped his inactivity last October, after being away from the ring for over a year, and won a six round decision over undefeated Miguel Dumas.

Prior to that, Mayfield had lost two in a row and four of his last five bouts - including decision losses to Thomas Dulorme, Emmanuel Taylor, Dmitry Mikhaylenko and Bakhtiyar Eyubov.

In 2015, a year where Mayfield saw no action, his name was often used by Floyd Mayweather as a potential frontrunner for his retirement fight in September of that year. It was strange name to use, because Mayfield had lost his last two fights and would likely not be approved to fight for Mayweather's welterweight belts. At the end of the day, Mayweather selected Andre Berto, who Floyd also pushed as a frontrunner alongside Mayfield.