Tristan Dilley was two days away from her 15th birthday when someone she thought was a friend shot her dead in her bed.

Sources:

Murder Under the Friday Night Lights: A Homecoming Murder Season 3 Episode 2

Tristan Dilley: Murdered by her Boyfriend YouTube

Texas Authorities Believe Man Who Killed High School Cheerleader Was Planning Serial Murders | Shows | Investigation Discovery

PEOPLE Explains: Slain Teen Was Secretly Dating Older Man

Texas Cheerleader Shot by Boyfriend Who Later Killed Himself (people.com)

Oct 04, 2017, page A7 - Valley Morning Star at Newspapers.com

New documentary features SETX cheerleader Tristan Dilley's murder (beaumontenterprise.com)

Obituary information for Tristan Hope Dilley (adamseestringerfuneralhome.com)

Tristan Dilley: What Happened to the Silsbee Cheerleader? (yahoo.com)

Police release note left by Silsbee teen’s suspected shooter (beaumontenterprise.com)

Evidence at murder scene of Silsbee teen led to 19-year-old Vidor man who shot self to death | 12newsnow.com

Texas Cheerleader's Suspected Killer Left 8-Page Note (people.com)

Tristan Dilley Murder: What Happened to Paul Audrey Adams? (thecinemaholic.com)