Adam without realising it, allowed his Bloodlust to take over and beat the gang, after the small amount of hate he felt towards the despicable nature of that gang.
He was noticing that although his emotions clouded his judgement and should be suppressed in certain situations with his Hunter's mind, they also granted and fuelled his power and drive.
But Adam couldn't help but feel slightly wary and confused by the lack of police in the areas that Elizabeth was taking him to, and couldn't help but praise Elizabeth's cautiousness and planning that surpassed even his own.
She took into account that the amount of police intervention was low in the poorer areas and targetted small and non-influential gangs that she would be able to draw to her side easily.
The police focused more on the richer and more central areas of the city, leaving the outer and poorer areas neglected, as everything was controlled by those of higher status, wealth and power.