Delicate subject, need non-judgemental advice

Ok so I have a very delicate situation that is regarding entry clearance of a valid visa holder who has committed a crime in the US and would like to re-enter the UK. If there is someone with a good grasp of the rules/laws, could you please pm me? I am also looking for a lawyer/immigration adviser to talk with them about the situation.

Do immigration lawyers ever give free first consultations? Right now I just mostly need to know if entry will be granted given the full circumstances.

If a misdemeanor, speak with Medivisas (Victoria Sharkey).

If a felony, contact Laura Devine (it's a whole agency).

Neither will be free consultations.  Laura Devine will be more expensive than Medivisas, but more equipped to handle something severe.

There are Home Office staff on www.immigrationboards.com and I've seen them give general advice on crimes.
If you want more help than that, you will need to pay for it.