Luke Hadler—Billy Hadler

Luke Hadler and Billy Hadler are father and son, a relationship the novel renders through the ordinary evidence of family life rather than extended scenes of the two together. Photographs on Luke’s phone, a child’s misspelled Father’s Day card, and a cup marked Daddy give that bond a material presence. After Billy is murdered, these modest keepsakes become reminders of a future and a household abruptly cut short.

Identity and Evidence of Their Bond

At a meeting in Melbourne, Luke tells Aaron Falk that Billy is one year old and growing fast, then brings up numerous photographs on his phone. Falk scrolls through them with the polite patience of someone without children. Luke supplies anecdotes about people at the conference; Falk, in turn, talks about his police work. Their conversation makes Billy a distinct part of Luke’s life even in a setting far from home: Luke chooses to share images of his son and updates about his growth with an old friend.

The account does not provide a long sequence of father-and-son interactions. Instead, it lets objects and remembered conversation establish their connection. Years later, while looking through the Hadler bedroom, Falk finds a hand-painted coffee cup on Luke’s bedside table, marked with the word Daddy in a child’s uneven lettering. The cup is dirty, an everyday object left where Luke used it. Its presence brings the child’s address to his father into the adults’ shared bedroom, making family life visible through a detail that has not been arranged as a memorial.

The Card and the Family Home

After the killings, Barb Hadler sits on the edge of Luke and Karen Hadler’s bed with a drawer emptied onto the pale-green duvet. Socks, boxer shorts, loose coins, and pen lids have been mixed together in the search. Among them she holds a handmade Father’s Day card. She points out that Billy’s spelling was as poor as his father’s, trying to laugh before her voice breaks and she begins to cry. The card’s misspellings connect child and father through a small, affectionate likeness; Barb’s interrupted humor shows how the same detail now hurts as well as comforts.

The bedroom supplies further context for the card. Falk sees evidence that both sides of the bed had been used regularly: Karen’s books and reading glasses are on one side, while Luke’s charger and the child-made cup sit on the other. The pillowcases retain the impressions of heads. Falk concludes that Luke had not been sleeping on the couch in the days before his death. These details do not prove a particular exchange between Luke and Billy, but they establish the room as a shared marital bedroom within an inhabited family home—not a house already divided into separate lives. The card and cup belong to that everyday setting.

Murder and the Meaning of the Keepsakes

The relationship’s most consequential fact is the violence that ends Billy’s life. During the investigation, Greg Raco reminds Dr. Leigh that three people died and that the boy was six years old when his head was shot. The blunt description makes the child’s death impossible to treat as an abstract element of the case. It also changes the register of the domestic objects: the Father’s Day card and Daddy cup are not clues to a hidden crime, but traces of the father-son life that the murders destroyed.

The surviving evidence gives the relationship different temporal forms. At the earlier Melbourne meeting, Billy appears in photographs on Luke’s phone as a rapidly growing one-year-old, known to Falk through Luke’s updates. At the Hadler home, the cup and card preserve a child’s direct address to his father. After the murders, Barb encounters the card while searching through Luke’s things, and its familiar spelling becomes a point of grief. Together, these moments locate the father-son bond in sharing, routine, and family memory. The novel does not need to supply a final conversation between Luke and Billy: the domestic objects, set against the confirmed murder of the child, make the loss legible.