Bigamy is illegal in many countries and can lead to criminal charges. He didn't realize that bigamy was a criminal offense until the police arrived.
Pro Tip 2/3
Cultural Sensitivity
Culturally, bigamy might be more accepted in some societies, but it remains illegal in most Western countries. Even though bigamy is culturally accepted there, he was still arrested in his home country.
Pro Tip 3/3
Accidental Bigamy
Someone can unknowingly commit bigamy if they think their previous marriage is legally over. Anna's second marriage resulted in accidental bigamy because her divorce wasn't finalized.