Here's where we're at so far in the first of the two Biden criminal trials.
For conviction on count 1 (lying on a federal form), Hunter needs to have known he was addicted to illegal drugs in October 2018. For conviction on count 2 (lying on a federal form), Hunter needs to know he was an active user of illegal drugs in October 2018. Conviction on count 3 (illegal possession of a firearm) logically follows a conviction on either of the first two counts. 
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Witness 1, Hallie Biden, Hunter's sister-in-law with whom he had a sexual affair after his brother was stricken with cancer, testified she: 
- Found a crack pipe in her house on July 3, 2015 and, when she confronted Hunter with it, he said it was his. 
- Discovered drug accessories in Hunter's car five different times from 2015 to 2019, though not in October 2018. 
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Witness 2, Zoe Kestan, one of the abused prostitutes Hunter was fucking, testified she: 
- Saw him smoke crack an average of twice each hour during a week she was compelled to party with the Biden Family princeling in December 2017. 
- Saw him smoke crack in May 2018. 
- Saw him in possession of crack in November 2018. 
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Witness 3, Erika Jensen, an FBI special agent, testified that: 
- In October 2018 Hunter withdrew $50,000 in cash from his bank account and drug dealers typically require cash payments for drugs
- The day after he bought the gun, he sent a text message to a friend that said he was "sleeping on a car smoking crack on 4th street and Rodney"
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Evidence 1, the audiobook of Hunter Biden's published memoir which he narrated in his own voice and in which he says he was a "heavy user" of cocaine in the Autumn of 2018. 
The prosecution will call more witnesses tomorrow.