Complex sentence: During the past 20 years Ofshe has qualified as an expert and testified on the subject of influence in police interrogation and the phenomenon of false confessions more that 300 occassions in 34 states in Federal courts, state courts and military courts in the United States.
Split into simpler sentences: During the past 20 years Ofshe has qualified as an expert on and testified on the subject of influence in police interrogation and the phenomenon of false confession on more that 300 occassions. This testimony has been in 34 states in Federal courts, state courts and military courts in the United States.