Nevertheless, if a fraction of Maxey's generalized allegations are true, for example the allegations concerning unauthorized possession of "keys" to the secrets, he is liable for a lot of jail time especially if one adds the alleged photographs of underage girls, the crimes concerning his loss of a handgun, drug possession and his tax violations.
The accumulated packages so serious that one must expect that Joe Biden will grant his son a pardon because the political cost of issuing the pardon would be trivial compared to the potential impeachment and criminal liability that might attach to Joe if a full-blown prosecution of Hunter begins to unravel the whole corrupt family business.
I assume it would be a plenary pardon because it is difficult to even identify the universe of Hunter's crimes. However, if the pardon is plenary then Hunter would lose the right to claim self-incrimination and would be forced to testify. If some small element were withheld from a pardon to save that right for Hunter to protect Joe, the inquiring agency might cut a deal with a prosecutor to extend immunity to take away the privilege against self-incrimination.
All of this assumes that we will have some identifiable semblance of rule of law that will spontaneously flower like tulips in the spring and there might actually be a real-life prosecution of Hunter Biden.
Somebody posted a coherent explanation a few days ago about how lots of government laptops have these keys installed but access still is need to know and requires special hardware and codes to get in.