FBI expert revealed Tanner Horner searched whether FedEx truck cameras record after allegedly killing 7-year-old Athena Strand, trial testimony shows.

The mother of killer FedEx driver Tanner Horner hauntingly told her son, “I know how you get,” after asking him whether he had sexually abused his 7-year-old murder victim, Athena Strand. On Monday, a jury in Fort Worth,

The letters—including one to Athena Strand’s family—were found in Tanner Horner’s jail cell after he made a suicide attempt.

Horner's letter to the Strand family was apologetic and placed blame for the girl's death on him, but a letter to detectives blamed someone else.

Killer FedEx driver Tanner Horner Googled to see if the cameras in his truck “constantly record” after he murdered 7-year-old Athena Strand, a jury in Texas has heard. The day after he strangled the girl and dumped her body,