Rapper/activist Nipsey Hussle was murdered outside of his Marathon clothing store two weeks ago in Los Angeles.

The man accused of killing Nipsey, a gang member named Eric Holder, is believed to have shot the rapper and then escaped in a car driven by his girlfriend.

Police interviewed the girlfriend - and determined that she was not a part of the murder plot.

But now there's new evidence that suggests that she may have known about Eric's plans to kill Nipsey.

Here's what TMZ is reporting:

Nipsey Hussle's murderer made a mad dash to a car with a driver who was waiting to speed away from the murder scene -- and it's all captured on video.

TMZ has seen the video -- shot from a surveillance camera in the area. You see the shooter race down an alley to the waiting car. The killer stops at the car for a second, then gets inside the passenger seat and the driver floors it. It's apparent from the video ... the driver was waiting to bolt from the scene.

As we reported, the driver of the car was interviewed by LAPD detectives 2 days after the murder, but was allowed to leave without being arrested. As we reported, law enforcement sources told TMZ, "Sometimes you have to give a little to get a lot." The clear intimation ... the driver was giving cops info.

It's now been several weeks and the driver still has not been arrested, although, our law enforcement sources tell us the LAPD and the L.A. County D.A. are "actively investigating."