United Kingdom, Aug. 22 -- Hayden Panettiere's friends and family "deserve the truth" about her death.

The actress passed away on August 16, aged 36, and Zach Hickerson, the brother of her on-again, off-again boyfriend Brian Hickerson, hopes the truth emerges soon.

Zach told TMZ: "There are a lot of assumptions, speculations and accusations currently swirling.

"The truth will come out as the authorities complete and release additional details from the investigation. And that is important because the people who loved and adored Hayden deserve the truth."

Zach described Hayden as "one of the most precious individuals on this earth".

He also argued that Hayden's friends and family should be allowed to mourn her passing without any "addi...