Murder around christmas time, England/UK, 2012-2020

This is a strange thing, but i'll explain as best i can, you know those things that people often in windows around christmas time? candle bridges (though most are electric these days) my parents always had one, but after one christmas, i'd say 2013, they vanished, i actually forgot they were a thing for years.

Until i was a teenager in the late 2010s, i was out shopping with my parents and i saw one, it was one of those instant nostalgia moments and honestly anything that reminds me of christmas as a kid is a good thing, so i did the obvious and went to buy it.

My parents started giving me a look of disapproval and acting strange, my dad said 'I don't like those' i tried asking him why but he wasn't responding but i do remember him saying 'that guy who was murdered, he had one in the window'

I'm looking for more information on this murder that must have happened around christmas time and possibly in the victims own home? and why it traumatized my parents so much, for all i know the candle bridge probably wasn't involved directly but they saw it in the background of a news report? worth noting that my parents are very strange and aversions to everyday objects aren't uncommon, they have poor memory yet seem to know every crime that's happened in the country since they were born.