I'm aware of the rumors.
There's also the CBS 48h special, where it is stated that Xana's sister Jazzmin was also made aware of what happened on the morning of the 13th.
Transcript of the segment:
Narrator: On Sunday morning, November 13th, Xana's friends started calling Jazzmin, saying something bad had happened on King Road. Jazzmin rushed over to Xana's house.
Interviewer: "And while you're driving that 8, 9 miles over to the house, are you trying to reach your sister then?
Jazzmin : Mhhmm (nodding yes)
Interviewer : How many times did you call her?
Jazzmin: A lot, I called her a lot. I called Ethan a lot.
Narrator: Her next call was to her father. Jeffrey had been visiting Jazzmin for Dads' weekend, and was on his way home.
Interviewer : So you answer the phone, what do you hear?
Jeffrey: I hear kind of, crying, and just telling me to get back to Moscow and meet me at Xana's house, and... You know my heart drops, instantly, I raced back down there"
See from 7:40 timestamp: