The first attack occurred along 18th Street on May 12. A 26-year-old female was approached at knifepoint, at 10:30 at night.
Manny Jimenez who lives on the street knew of the attack.
"It happened right here. That's why we put the camera here," Jimenez said.
Police have looked at the video from these cameras in hopes that it might yield clues. Cameras caught the suspect in another location too.
After showing the pictures to Claire Humphreys, her first thought is not to resist.
"Make sure you drop the wallet. What's in it is not as important as your life. And then get away as fast as possible," Humphreys said.
Shawnte Crespo, a resident in the area, said, "I don't even know if it's safe to try and fight a person off anymore because you don't know what the person is capable of doing. I would say try and draw as much attention to yourself and try and defend yourself as much as possible."
The suspect is described as a black male, in his 30's, approximately six feet tall and weighing 200 pounds.
His last attack was on Wall Street. The victim was shoved against a wall, and her cell phone was stolen.