Michael Singley made a crucial mistake that criminals just shouldn't make.

He returned to the scene of the crime.

Police arrested Singley, of Juniper Street near Synder Avenue, early Sunday after he returned to a South Philadelphia Starbucks Coffee shop the morning after he allegedly stabbed another man the previous night.

Cops said Singley is accused of stabbing a 29-year-old man in the face and upper body while waiting in line for coffee at the Starbucks on Broad Street near Jackson.

Police said it was unclear what led to the attack that critically injured the unsuspecting victim. The unidentified man is still in critical condition at the Hospital of the University of Pennsylvania.

Court records show that Singley has had numerous prior contacts with police, witharrests dating back to 1973 and including weapons offenses, theft, burglary, assault, terroristic threats, and disorderly conduct.

Singley is scheduled to appear in court tomorrow on the new charges of attempted murder, aggravated assault, simple assault, possession of an instrument of crime and recklessly endangering another person. *