Hunter Biden’s felony trial starts today in Wilmington, Delaware, where he faces charges for allegedly purchasing a firearm while being addicted to drugs in 2018.

The trial is expected to last between three and six days, focusing on some of Biden’s most turbulent periods.

Prosecutors will present evidence from Biden’s memoir and testimonies from his former partners to substantiate his drug use at the time of the gun purchase.

Biden’s defense argues that the charges are the result of selective prosecution and violate his Second Amendment rights.

A conviction could result in a maximum prison sentence of 25 years.