Police say so far, he's robbed 10 men and women since January.
In each robbery, he followed each victim into their apartment building and then threatened them with a knife or gun.
Police say he's stolen everything from purses and cell phones to a pair of boots.
The suspect is described as a black man between the ages of 25 to 40, approx. 5'6"-5'11" in height, and 130-170lbs.
Anyone with information in regards to these incidents is asked to call Crime stoppers at 1-800-577-TIPS (8477).