Oak Creek Patch has the story …
According to the Oak Creek Police Department logbook, a security guard at Caterpillar’s South Milwaukee facility reported seeing a man matching the description of the suspect talking with a Caterpillar employee.
The employee told police the suspect is his roommate. A detective then went to the suspect’s South Milwaukee apartment and arrested him.
Online court records show the man, who had not been charged as of noon Monday, has open cases in Milwaukee and Racine counties for misdemeanor retail theft. He remains in Milwaukee County Jail.
Nice job, Caterpillar security guard.
South Milwaukee Blog 
Thanks Eric, I was the one who had taken this mans description and made the call.
I was contacted by OCPD on Sunday Mid-Day and was made aware that he was arrested late last night. A arrest with-in 24 hours does not happen very often.
– Former Resident of SM and FF – S/O