ACF and PCF plots

I'm running an acf and pcf plot for the difference in arrests between two states, but I have no idea what they're telling me if anything at all. Any help would be appreciated.

par(mfrow=c(1,2))
acf(aME)
pacf(aME)

We cannot interpret the graph without knowing the details. Assuming the blue dotted line is for the significance cut-off, it is just showing that there is a significant correlation at lag 1 followed by correlations that are not significant.

This blog might be useful have a look,
Interpreting ACF or Auto-correlation plot | by Dipanwita Mallick | Analytics Vidhya | Medium.