LOS ANGELES — When Emily Watson heard she was being sent a script for Appropriate Adult, she was wary. The made-for-TV movie, which premieres Saturday on Sundance Channel, depicts the real-life relationship between British serial killer Fred West and Janet Leach, a social worker in training who was asked to sit in on police interrogations as an "appropriate adult," a role in the United Kingdom legal system meant to safeguard the rights of young people and vulnerable adults in police custody.
That was how Leach, a Gloucester housewife, found herself in a room on Feb. 25, 1994, as West matter-of-factly talked about strangling and dismembering his daughter. Leach eventually sat in on 40 interviews as West revealed depraved details of the Cromwell Street murders — at least 12 young women and girls killed by West (and his wife, Rosemary West) — in one of the biggest police investigations in British history.
Watson has been uncompromising in her career, choosing offbeat roles and frequenting independent films. But the extremity of the West case unnerved her.
"It's obviously a very sensitive subject matter," she said in a phone interview. "When there are crimes of a sexual nature — murderous crimes of a sexual nature — it's very, very difficult material. But I think it's important to investigate those really dark parts of our society and discover how human beings get to that point and just live amongst us and prey on people."
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Written by Neil McKay, Appropriate Adult examines the curious connection between Leach and the often-charming killer, played by Dominic West. "The murders were so notorious you couldn't help but be aware of them," Watson said. "But I had never heard of her and what I learned was so absorbing. It was not like anything I've ever done before."
Before meeting Leach, Watson studied transcripts and the countless interviews producers had conducted with her.
"I only spent an afternoon with her," Watson said. "In a way, when I met her, I didn't want to sit there and go 'so what happened when you did this?' or 'Why did you do this?' I really just wanted to feel what her center of gravity was and see the look in her eye and how she was as a person. She's very interesting. I almost expected her to be timid and broken. I think she's recovered a lot since then. I think she's much stronger now than she was. She was sucked in."
Fred West is portrayed as a charismatic personality who was both drawn to his appropriate adult and drew her in, requesting Leach's presence and sometimes confiding horrifying details to her when they were alone — seemingly playing on her sympathy and humanity and exploiting the duty of confidentiality she owed him, preventing her from telling police. McKay chose to focus on West's psychological grip over Leach rather than the violent murders themselves.
"The more we researched it, the more we realized how extraordinary her story was," he said. "It's a way of dealing with a sensitive subject without getting caught up in blood and gore and sensationalism."