Mariah Nicole Bons is a 20-year-old from Phoenix, Arizona .  She is the sister of rapper Lil Peep 's incarcerated fan Nicky Bons , whom his final tweet was directed towards.  She is the subject of a police investigation looking into Lil Peep's death. 
Death of Lil Peep
Timeline of Events
At 5:45 pm, Peep's manager checked on him on the tour bus and says he was taking a nap, snoring and breathing without issue. 
At 10:57 pm, Mariah sent another message to the group and said "Gbc high af because of me and my friend lol." She left the group after the message.  In a Snapchat message, Mariah clarified that she dabbed Gbc out and that's what she meant when she said that "Gbc got high af."  Mariah has since deactivated her Twitter . 
After Peep's death, Mariah summarized what happened in a Snapchat . She said that Mackned asked for xans, a friend of hers picked them up and brought them to Gbc. She also said that Peep took 60 milligrams of roxi, a form of Oxycodone before, and she assumed he was nodding off from that. She states that she was unaware of any Xanax usage from Lil Peep.  
Police are still investigating the incident and are yet to confirm anything. They are especially looking into whether fentanyl played a role which has been described as a major problem in the Tuscon area.   Law enforcement are looking into texts sent by Mariah.  Mariah has since went into hiding.
The final toxicology report said that the cause of death was a combination of fentanyl and alprazolam .  The manner of death is certified accidental.  The Tuscan police department says that they are investigating a possible homicide and are trying to figure out where the drugs came from.