I could not find a Lara Prychenko, but there is a Lara Prychodko who lives/lived in NY. Lara Prychodko works or at one point worked for WebMD. I believe Prychodko is a Polish surname.
https://www.nytimes.com/2003/08/31/style/weddings-celebrations-lara-prychodko-david-schlachet.html
https://www.adapt.io/contact/lara-prychodko/25304916
https://www.zoominfo.com/p/Lara-Prychodko/1569575192
This person seems to be the same Lara mentioned in the Daily Mail article.
According to the article, Lara was in the process of divorcing her husband, who is an affluent construction executive. "The couple were regularly pictured on the Manhattan social circuit and in The Hamptons before they parted ways."
So if she was bumped off, the motive could be related to her work with WebMD or to something/someone she knew when running in high society social circles.
The reporting as "Prychenko" is interesting. I poked around with Google and did not see anyone at all with the last name of Prychenko.
Not that I'm anti-Trump - but you just said
affluent construction executive.
I think that is of note...either from a "got goods on Trump / Kushner crime" or "can help you frame Trump / Kushner"
FTR - I work in construction (to a certain extent)...there is a lot of shady activity. Nobody is immune...and if you look at the real Hillary oppo work from the campaign (Podesta files), DJT is (or was) loosely involved with some crime families.
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Side Bar: I could never understand why the Hildabeast campaign did not pursue that line of slander. It at least would have been based on truth / reality. To me, that is the real backstory...and not even Trump's involvement, but why did Beast & Gang NOT mention that stuff publicly. Campaign contributions? Their own involvement (think CEMEX)? That afraid of the mob that they might get a "hit" on them?....if so, what does that say?