You are arrested (if this is federal)... taken to a U.S. Marshals office to be processed and for a first appearance. You are interviewed by pretrial services related to bond. (Most white colar will get a bond.) You are ordered to have all firearms removed from your house by someone other than you. It does not matter how many people live in the house or who owns the guns... they are ordered out of the house. You are released on bond, and supervised by pretiral services.
At this point you are not a convicted felon... you are innocent until proven guilty, BUT as a condition of your bond, no firearms where you live or in your possession during your court proceedings. None in the house you live in no matter who owns them. The "It's my wife's gun" will not fly and you could have your bond revoked and stay in custody until your case is settled by trial or guilty plea.
Guilty... no firearms for life. Once again if there is a gun in your house, the "It belongs to my wife or child" will not fly. You will be in constructive possession of a firearm. You can and will be charged with felon in possession of a firearm. No matter who owns the gun, it is taken as evidence and will later be destroyed after conviction.
If found not guilty... as soon as the jury delivers the not guilty finding to the judge at the end of the trial. You can again have your guns moved back into the house.
Unless somehow the gun was associated to the white colar crime, or some other reason to take it for evidence... it will not be taken as a rule when you are arrested. Of course if you are arrested from your car when you are stopped in traffic, and you are on your way home from shooting, the car will be towed and the weapons held to secure them from theft. If you are a licensed CCW, they will take it and your attorney can have it released to a family member since it is not evidence, as with all personal property. ...and of course you cannot CCW while on bond as a condition of your bond. State law will apply related to a not guilty finding at trial, and if it will effect your CCW afterwards because you were arrested for a felony.
That is the way it works in federal court.