you/he need to invest in a lawyer who can tell the court all about what has been going on in your son's life recently .i.e. fathers illness, suicide attempt , breaking up with his partner/girlfriend and if he is lucky and genuinely sorry for his misdeeds the court will take this into consideration and ask for a probation report but get it wrong they will throw the book at him.
If it were me I would Just concentrate on supporting you husband,a 29 year old should have known better, and let him sort it out himself and take the consequences he is a grown man.I sincerely hope that your husband gets better news at the hospital, it must be very hard for you trying to hold it all together, you dont deserve all this aggro.