The first “drugging” victim was married and appears to have been partying hard along with the second victim to die (who had just recently moved to the US from Mexico). Might have saved them both if they had stayed at home. Never “party” to the point that your own sense of self preservation and situational awareness is not exercised. Know your own limitations and who you socialize with.
I’m guessing they were doped. And they did not know it. Roofy, I think they call it.
https://www.midwoodaddictiontreatment.com/roofies/
Younger people sometimes party hard. It’s not knowing who they partied with - drug slipping predators who dosed them heroin for obvious reasons. Murder charges for the perps.