Hi, I'd like to help you with your question.
It sounds like your husband has either had a psychotic break or he is suffering from delusions, possibly related to schizophrenia.
I am curious what your husband's therapist has to say about this. At the very least, your husband's therapist should have done an evaluation initially and given your husband a diagnosis. If he is seeing a psychiatrist as well, then there should be either a confirmation of the therapist's diagnosis or vice versa. If this is a new symptom, then there should be a re evaluation to see if there needs to be a revision in his diagnosis.
Although there is a possibility that these types of things do occur in families with money and connections, the reason your husband gives for the hypnosis and drugs is not very plausible. Why would they need to control him? Has he been a threat to someone? And if he feels this is true, why not go to the police? Also, a tracking device in his thumb would be easy to detect with a simple x ray. The fact that he has an elaborate scheme but no evidence tells you that it is most likely in his mind.
Because your husband was abused, you may want to consider a psychotic break first before you consider schizophrenia or a persecutory disorder. Sometimes, when people are abused, they can break down because they run out of coping mechanisms. It is rare, but it does happen. It usually lasts until the person can get help. The nature of the psychotic break can be persecutory, where they feel everyone or someone specific is out to get them. Medication and therapy help enormously in dealing with these kinds of breaks. Sometimes hospitalization is required but that should be determined by your husband's therapist or doctor.
Schizophrenia is the another option. I don't know your husband's age, but onset usually occurs in late teens or young adulthood to age 25. It can occur after age 25 but diagnosis after 40 is very rare. It is important that your husband talk to his doctor or therapist to see if he has any other symptoms related to schizophrenia.
Persecutory disorder is also a possibility. This is when a person believes others are after him or her and are plotting against them. This is best addressed by medication and therapy as well.
If he feels suicidal and tells you he has a plan, get him to the local ER as fast as you can. You can also contact 911 if he will not coorperate.
Try your best to calm your husband's fears. Don't say you don't believe him, but do not confirm his beliefs either. Focus on being supportive and being there for him. Until he is seen by a professional, this is the best action you can take.
I hope this has helped you,