West Covina is home to shopping centers, strip malls and plenty of resturaunts. A DUI lawyer can show you how to fight a DUI case in West Covina. DUI arrests involve scientific evidence such as blood, breath or urine tests. These cases also involve physical evidence, such as evidence of bad driving, witness testimony or police reports. It helps to speak with a DUI lawyer who is familiar with the defenses of a DUI case.