The harrowing programme showed Thames Valley Police’s investigation from the moment Natalie, 31, was reported as missing to the conviction of her killer last year.
The pioneering documentary told the story of how the mother-of-three had endured years of abuse from her ex-partner Paul Hemming and how he became jealous after finding out she had met someone new.
Paul, 42, was later found guilty of murdering Natalie after a massive police search, which went on for three weeks, found her beaten to death in a wooded area of Hertfordshire.
Prosecutor Simon Russell-Flint, QC, said Paul killed her in a “fit of rage and jealousy” after finding out that she was planning to leave him.
Natalie Hemming was reported missing and then found beaten to death
Natalie's ex-partner Paul Hemming was found guilty of murder
Natalie and Paul Hemming pictured together
Those watching at home found the documentary “heartbreaking” but hailed Natalie’s family as “brave” and praised them for saving lives by bringing awareness to domestic violence.
One person wrote: “Watching #CatchingAKiller – very brave of Natalie’s family to allow this to be shown. You will save people I am sure.”
“#catchingakiller …… heartbreaking…really hope it helps anyone in a controlling relationship to find the strength to get out,” commented another.
A third added: “Wonderful insightful show that will save lives – thanks to all involved for your service #catchingakiller.”
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Thames Valley police led a massive hunt for Natalie Hemming
“Seeing this makes me so glad I left an abusive relationship when I did. PLEASE. leave when you see the warning signs #catchingakiller,” said one person on Twitter.
Others praised the police’s efforts to find Natalie: “Respect to Natalie Hemming's family for allowing tv access & #C4 for highlighting #coercivecontrol dedicated police work #CatchingAKiller.”
Catching a Killer is now available on 40D.