Oscar Pistorius tweeted about intruder fears months before being charged with murder

South African runner Oscar Pistorius was charged with murder on Thursday after his girlfriend Reeva Steenkamp was shot at his home in Pretoria. Pistorius, who had collected considerable fame and wealth after becoming the first double amputee to run in the Olympics, reportedly kept several weapons at his home in South Africa and some early reports say Pistorius mistook his girlfriend for an intruder.

What exactly happened is still unclear — police say they had been called to Pistorious' home for "incidents" before — but a tweet he sent in November reveals that he was a bit jumpy when it came to personal safety:

As Yahoo! Sports reported, Pistorius kept several weapons in his home, and lived in an area of Pretoria with armed security.

"There was the pistol by the bed, the machine gun up against the wall, the baseball bat under the window, a cricket bat too. He was concerned by safety and security to a high level, there was no doubt about that."

Nike featured Pistorius in several ads. This image was running on Pistorius' website late last night.

Pistorius is expected to appear in court on Friday, where hopefully we'll learn more about what transpired at his home.