Daniel J. Lattimer was the father of Pete and Jeannie Lattimer, the husband of Jane, and was a firefighter. His badge number was 4994.
Pete's father died in the spring or summer of 1994 when Pete was twelve years old saving six people from a house fire. It was this incident the led to Pete to always trust his hunches, because as a boy he had a "vibe" on that day that it would be the last time he saw his father. Putting it down to anxiety because of his Dad's job and not wanting to appear weak in front of his father he remained silent. Later that evening his family received word of his Dad's death and Pete vowed to always trust his hunches.
During the incident at the Quartz prison, Pete was visited by a hallucination of his father who blamed him for his death; Pete would have succumb to the hallucination but remembering what a reformed prisoner at the prison has told him; "The most cruel prison is the one we make ourselves" he realized the only way to escape the hallucination was to make peace with it and himself. Doing this Pete was finally able to rid himself of the guilt that had hounded him since the day his father died.
Pete and his father were very close during his lifetime; he took his son camping often and taught him about constellations, knowledge Pete has kept his whole life.
Mr. Lattimer, being Jane's One, knew about the Warehouse, the existence of artifacts, and his wife's status as Regent.
↑In the "Pilot" episode, Pete says his father died when he was twelve years old. This badge gives Pete's birthday as November 5th, 1981. The funeral for Pete's father, seen in "Shadows", took place in his hometown of North Canton, Ohio; snow was not seen and the trees were green, indicating that the episode took place in the spring or summer of 1994.