An Ottumwa man has been charged with aggravated assault after an incident Thursday morning (5/14) in an Ottumwa alley.  Ottumwa Police say they were called around 9:10am about a disturbance in the south alley of the 400 block of East Main Street.  Police were told a man was threatening a woman with a handgun.  The suspect was identified as 34-year-old Carlos Mendez of Ottumwa.  He was arrested and charged with aggravated assault.  Mendez is free on bond; the investigation continues.