Complex sentence: This notion of false accusations occurring often came about after the police and investigators began to follow an "over-cautious approach" when addressing reports of domestic violence, but the study showed there were only a few false allegations during seventeen months over 2011-2012.
Split into simpler sentences: This notion of frequent false accusations came about after the police and investigators began to follow an "over-cautious approach" when addressing reports of domestic violence. However, the study showed there were only a few false allegations during seventeen months over 2011-2012.