I think the girl should sue the pants off of them (PARDON THE PUN, NONE INTENDED). Sounds to me like that officer just wanted a quick peek at a 18 year old girl.

He pulled her over because her headlight was out! How does that require a search? They had already searched her car and found NOTHING, she offered to take a Breathalyzer so where in the hel* was the probable cause?

Probable cause for such a search may be supported by a reasonable suspicion of criminal activity if it is based on an informant's tip or if the driver voluntarily informs the officer that there is something illegal in the car (for example, drugs). An officer can then only search the car's trunk if he has probable cause to believe that the illegal evidence or contraband is located there, or the driver consents to this specific search.
There are some exceptions to these general rules. Police may briefly detain and conduct a limited search of a person in a public place if they have a reasonable suspicion that the person has committed a crime. Reasonable suspicion is a level of belief that is less than probable cause. A police officer possesses reasonable suspicion if he has enough knowledge to lead a reasonably cautious person to believe that criminal activity is occurring and that the individual played some part in it. In practice this requirement means that an officer need not possess the measure of knowledge that constitutes probable cause to Stop and Frisk a person in a public place. In any case, an officer may not arrest a person until the officer possesses probable cause to believe that the person has committed a crime.
Strip searches without a warrant are presumed to be unreasonable, and therefore, prohibited by the Fourth Amendment unless there are exigent circumstances and probable cause.

Strip Searches Without an Arrest: Strip searches of individuals in the field who have not been arrested may be conducted only in the following circumstances:

When there is probable cause to believe that evidence, weapons or contraband exists and will be destroyed or lost in the absence of an immediate strip search; or
When there is probable cause to believe that an immediate search is necessary to prevent imminent danger to the safety or health of the suspect.
Otherwise, a warrant shall be obtained or an arrest made before a strip search is conducted.
http://www.ci.minneapolis.mn.us/mpdp...-200/9-200.asp
Granted, we do not have the whole story but nowhere in the article did it say they were acting suspicious, not doing as they were told, acting up or being difficult in any form.