To make matters tenser, Mehserle was recently released from prison for good behavior after serving 11 months of his two-year sentence. This has infuriated those who don't believe Mehserle's defense that he meant to reach for his Taser instead of his gun when he shot and killed Grant.
"The fact that a police officer can serve less than a year in jail for taking the life of a young black man has galvanized the communities of the San Francisco Bay Area and beyond," Change.org campaigner Nadra Kareem Nittle said in a statement.
A "separate sovereigns" exception to double jeopardy allows the federal and state governments to separately prosecute someone for the same act.
On Tuesday, BART paid a $1.3 million settlement to Grant's family after his mother, Wanda Johnson, filed a federal civil rights lawsuit. Yet, according to the Chronicle, nowhere in the deal did BART acknowledge wrongdoing on its part. The settlement was in addition to the $1.5 million BART paid to Grant's 7-year-old daughter, Tatiana, in 2010.