Former NFL player Aaron Hernandez is in the middle of his second murder trial in two years this week.

Hernandez is charged with shooting and killing two men, Daniel de Abreu and Safiro Furtado, outside a Boston nightclub in July 2012.aaron-hernandez

During opening statements, prosecutors said Hernandez taunted the men before shooting them, claiming the former Patriots tight end said, “Yo, what’s up now?” before yelling a racial slur and firing, reports CNN.

Hernandez’s defense attorney, Jose Baez, who successfully defended Casey Anthony in 2011, said prosecutors got the information from one of Hernandez’s former associates, Alexander Bradley, who he called a drug dealer, liar and violent criminal who cannot be trusted.

“It takes a lot of nerve to put that man on the stand and ask you to believe him beyond a reasonable doubt,” said Baez.

Baez said prosecutors had no forensic evidence against Hernandez.

Prosecutors said the double murder stemmed from an incident earlier that night, when de Abreau bumped into Hernandez at the club, spilling a drink on him.

Prosecutors said Hernandez became angry and his anger didn’t go away.

They said later that night, Bradley was driving Hernandez when they pulled up to the victims’ car outside the club.

Prosecutors said Hernandez fired five shots, killing the two men and injuring other passengers.

Prosecutors said Bradley turned on Hernandez in 2013.

That’s when they Bradley made a joke about Hernandez shooting the two men. The joke angered Hernandez, so he shot Bradley in the head, prosecutors said.

Bradley has been given immunity in exchange for his testimony against Hernandez and is expected to play a central role in the state’s case.

CBS Boston reports jurors toured several key locations connected to the case on Friday.

In 2015, Hernandez was convicted for the June 2013 murder of Odin Lloyd and is currently serving a life sentence.