The symptoms and behaviors that a police officer's looking for during the initial detention at the scene of a DUI in Pennsylvania is in essence, any indication that the driver or the suspected driver is driving under the influence, or to put more simply, drunk. The police officer would be looking for if the person has glassy or bloodshot or watery eyes, if the person slurs his or her speech when they speak, if the person smells like alcohol or drugs in cases where a DUI, where a person would be under the influence of drugs may be suspected, if the person is outside of the car, if the person lack coordination, is unable to walk straight, has unsteady or wobbly gait.
Any indication that the person has been drinking, which in essence is when a person looks or sounds or smells like they're drunk, police officers could use as a basis for probable cause to deem a person to be suspected to be driving under the influence. A DUI charge is serious. Having an experienced Pennsylvania DUI attorney can help you understand and navigate the criminal process and they should be involved from as early as possible in the case.