"NY man seeking help for stray dog arrested for DWI", AP, 5/30/2010.
Or, if you prefer, "NY man trying to rescue stray dog arrested for DWI", Albany Times-Union, 5/30/2010.
Some other headline-writers dodged this particular ambiguity: "NY man rescues stray dog and gets arrested for drunk driving", Spokane Examiner; or the original story, "Man with stray dog drives drunk to police station, cops say", Times Herald-Record.
[Such are the perils of adding recursive compositionality to a language without vocalized parentheses...]
[Hat tip to Andre Mayer]