Troy Davis was executed Wednesday night by way of lethal injection for the murder of a Georgia police officer. An eleventh-hour plea to stop the execution, filed by Davis' defense team, was denied by the U.S. Supreme Court – leaving supporters worldwide both saddened and outraged.

Davis advocates have voiced their feelings across various social media platforms, including Twitter, where someone created an account dedicated to Troy Davis.

Also, the hashtag "#RIPTroyDavis" has become the second most-talked about topic on Twitter, according to the site's Trend list.

@RIPTROYADAVIS tweeted, "Casey Anthony gets a book deal, while #TroyDavis got a last meal. Charles Manson is still alive, and an innocent man just died. #RIPTROYDAVIS."

The Troy Davis account, which states, "He was shown no justice, no mercy, but he still forgave. He is in our hearts and minds. Follow to show support for him and the message he has brought us,” has attracted over 50,000 followers."

@trudybom wrote, "'An eye for an eye will make the whole world blind.' – Ghandi."

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"Dear AMERICA, we don't know if Troy Davis killed a man…But we know you killed Troy Davis….#RIPTROYDAVIS," said @IAMPOPGATES.

@JShahryar wrote on Twitter, "Dear Georgia, what can I say. 140 chars. are just not enough to express my outrage at the travesty your justice system created. RIPTroyDavis."

"With evidence, Casey Anthony is set free. Without it, Troy Davis gets the death penalty. Welcome to America, #RIPTroyDavis," stated @MrNiceCreps.

Davis' defense team made a last-ditch effort to halt their client's execution, delaying the sentence from being carried out for hours as 7 p.m. came and went.

It was not until about 10:20 p.m. that news emerged that the Supreme Court had denied Davis' final plea.

According to the Associated Press, the 42-year-old told relatives of Mark MacPhail, the police officer who was gunned down, that he was not responsible for the 1989 murder.

"I did not have a gun," he insisted. "All I can ask…is that you look deeper into this case so that you really can finally see the truth."

 Troy Davis was declared dead at 11:08 p.m. EDT.