A shot was sacked from inside the vehicle, and one police officer returned fire. People whom police interviewed - who were not named in the warrant - described Giles as single, lonely and disturbed, the document says.
An armed intruder broke into Free and Turney's Texas home on January 26.
Turney, 30, was made famous through her video blogs on anime, relationship advice and her life.
Ms Turney, who has an estimated net worth of $700,000 according to Celebrity Net Worth, is known for cosplaying and for being a host of internet news programs SourceFed and Rooster Teeth's The Know, as well as her own vlog channel. Free and another YouTuber run the channel The Slow Mo Guys, which has more than 10 million followers. Free was previously the creative director of Rooster Teeth.
Police searched Giles' phone, where they found multiple notes in which he talks about Turney and Free by name.
Police found notes on Giles' phone recording threatening thoughts, particularly towards Free.
A spokeswoman for the Austin Police Department said the case is under investigation and she could not answer any additional questions about it.More news: Omarosa Just Called Mike Pence "Scary" On 'Celebrity Big Brother'
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The couple addressed the incident on Twitter Tuesday. The couple awoke to the sound of a gunshot and shattering glass, before hearing someone enter the house through the back door. They hid in their bedroom closet and called 911 while Giles searched their home for them.
Giles left when he couldn't locate the couple, only to find Austin police officers waiting for him.
As police arrived on scene, a Lincoln sedan with New Mexico plates was seen backing out of the driveway to the home.
Giles was pronounced dead at the scene, with an initial report from the medical examiner indicated he died of a self-inflicted gunshot. A preliminary postmortem found that Giles may have, in fact, shot himself. An official ruling on the manner of his death is still under review.
Security footage shows Giles stalking the property, gun in hand.
According to court documents the man identified as 24-year-old Christopher Eric Giles drove 11-hours from New Mexico to Texas late last month. The fan, Christopher Giles, was later killed during a standoff with the police.
Turney reiterated Free sentiments in a separate tweet.