Yes you should hire an attorney to help you through this process. DCF will conduct an investigation as well and issue a report, which you can bring to court with you for a custody hearing.
This is general advice and does not establish an attorney-client relationship.
If the primary custody is in MA, you will likely need to take action there and not in CT.
Providing answers to questions on AVVO does not create an attorney/client relationship. It is not possible to provide legal advice in the context of question and answers on the internet. The "answers" posted are solely for the purpose of providing general information about legal matters. Consult an attorney licensed to practice in your state or jurisdiction before taking any action. Be advised that what you post on AVVO is not confidential and in a civil law suit may be discoverable.
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