He was drinking all day:
Cheney said he drank a beer with lunch the day of the shooting, according to his interview. … after the accident occurred, [he] fixed himself a cocktail.”
…the secret service “made an appointment” with the sheriff’s office for the next day and ran off the deputy who showed up to interview Cheney at the ranch.
Cheney must consume a virtual cocktail of drugs every day because of his heart condition. I wonder what kind of reaction throwing alcohol into the mix might have.
What is the most likely thing to happen during a 14 hour delay that is worth the negative publicity? One possibility is that it takes approximately that period of time for alcohol to dissipate in the body and no longer be subject to accurate testing. It is fairly common for people involved in alcohol-related accidents to delay reporting them until the alcohol has left the body.
From the NRA website:
Never use alcohol or over-the-counter, prescription or other drugs before or while shooting.