Final answer:
In the 1860s and 1870s, Irish immigrants comprised only twenty percent of New York City's population, but forty-two percent of the city's homicide victims were Irish immigrants.
Step-by-step explanation:
In the 1860s and 1870s, Irish immigrants comprised only twenty percent of New York City's population. However, forty-two percent of the city's homicide victims were Irish immigrants during this time period. This statistic indicates that Irish immigrants faced a disproportionately high rate of involvement in homicides compared to their population size.