John Hamilton, 82, and Paula Smith Hamilton, 85, spent their careers helping people navigate the hardest parts of being human. The Concord couple died Saturday after a head-on crash on Walden Street, less than a block from the home they'd shared since 2012.

As previously reported, a Honda Accord allegedly crossed the double yellow line near Bristers Hill Road and struck the Hamiltons' Tesla around 1 p.m. Both were airlifted to Lahey Hospital in Burlington, where they died. Two passengers in the Tesla and the Honda driver were also injured.

Family obituaries released through Concord Funeral Home, as reported by The Concord Bridge, paint a fuller picture of who they were.

A child psychiatrist who mentored generations.

John trained in medicine and psychiatry at Harvard Medical School and spent decades as a child psychiatrist, mentoring generations of psychiatric residents at Cambridge Health Alliance, helping lead research on adolescent depression treatment, and advocating for evidence-based practice. He earned Distinguished Life Fellow status from both the American Academy of Child and Adolescent Psychiatry and the American Psychiatric Association. His family described him as driven by "a voracious life of the mind" and boundless physical energy — the kind of curiosity that made him a genuinely compelling person to know.

A therapist devoted to strengthening relationships.

Paula, born in Everett, earned her doctorate in marital and family therapy after moving to Davis, California, and spent her career leading workshops for couples in committed partnerships. Her family remembered her as someone "more colorful than most of us," who brought vitality, strong opinions and outlandish ideas to every interaction she had.

A life built around shared adventure.

The couple loved the outdoors and travel together — sailing from Woods Hole, swimming in Boston-area pools, walking through Europe and the United States, and spending time on Nantucket and in California. Paula's family said Concord's natural beauty and transcendental history helped reconnect her with something larger in the world. Their family put their bond simply: John and Paula "were so closely connected that it would have been impossible to imagine either of them having to live without the other."

How their neighbors remember them.

Concord Police Capt. Brian Goldman, whose station sits across Walden Street from the couple's home, told The Concord Bridge they were "a nice family [who] always would wave or say hi." Neighbor Jeffrey Ward, who met the couple when they moved in, said simply: "We were friendly with them. They were very nice." By Tuesday, a handwritten note reading "Love, to all who suffer" and a sheaf of pussy willows had been tied to a pole near the crash site — a quiet tribute from a community still processing the loss.

Family and what's ahead.

John and Paula are survived by their children, Allison Webster and Pamela Webster, four grandchildren, Paula's sister Louise Catazano, and John's niece Lorri Hamilton. The Middlesex District Attorney's Office, Concord police and Massachusetts State Police continue investigating the crash. The family is planning a celebration of life for the fall; no date or location has been announced yet.