In the final episode, the truth about Tom's death is revealed:
Upon discovering the truth, Ben decides to take the fall for his daughter to protect her, leading to his arrest. Critical and Commercial Reception Secrets And Lies - Season 1
The investigation uncovers numerous secrets within Ben’s suburban community, including the revelation that Ben was actually Tom's biological father following a brief affair with the boy's mother, Jess. In the final episode, the truth about Tom's
Secrets and Lies: Season 1, Episode 1 Review - The Episodist In the final episode
Abby had planned to run away with Tom so they could escape their troubled households. When Tom wanted to turn back, Abby panicked and accidentally killed him with a flashlight.