In a series of tweets, "Grey's Anatomy" actor and activist Jesse Williams spoke out about the controversial killing of Alton Sterling, a Black man gunned down by police officers outside of a Louisiana convenience store on Tuesday.

Two police officers wrestled the 37-year-old father of five to the ground and shot him multiple times, despite the fact that he seemed unable to move.

Williams subsequently used social media to call on the public to "provide a list" of things that warrant the killing of someone at will without proper investigation.

Just last month, Williams delivered a powerful speech about racial injustice and police brutality at the 2016 BET Awards.

Following Sterling's killing, people are sharing this meme with Williams' words from his iconic speech.

Although touted as police reform for many agencies in the U.S., police body cameras have shown to be limited.

A bystander recorded and posted the final moments before two police officers, identified as Blane Salamoni, a four-year veteran of the Baton Rouge police department, and Howie Lake, a three-year veteran, shot and killed Sterling. The U.S. Justice Department is now leading the investigation of his death.

During the altercation, the body cameras apparently became dislodged, CNN reports.

According to Alternet, the body cameras on the police officers who shot Sterling "fell off." Although people argue for police officers to have body cameras in order to monitor police conduct, it is not a guarantee to stop police brutality.