Police said he hit businesses on the South Side three times this month.
Surveillance cameras captured the suspect each time.
Police said he showed a gun and demanded the money from cash registers.
Chicago police said the crimes happened at the following locations and times:
- 9300 block of South Ashland Avenue on May 9 at 7:52 p.m.
- 1700 block of West 87th Street on May 15 at 5:02 p.m.
- 1700 block of West 87th Street on May 21 at 11:47 p.m.
INTERACTIVE SAFETY TRACKER Track crime and safety in your neighborhood