Example of irony :Lindsay realizes that the fictional crime scene resembles the real murder scenes.
Example of foreshadowing: Patterson uses foreshadowing in the prologue where both Berryman and Toy where establushed as killers long before the killing / murder of Jimmy.
Example of external conflict: working conditions of policemen impact their
home lives; like Cross, they must often be away from spouses and children and
their professional obligations are frequently in conflict with their family obligations
.