I'm not sure what answer would be helpful. You don't have a right to an inheritance, and even if you are disinherited for reasons which are outlandish or unfair it is still the right of the person writing a will to decide to whom they are going to leave their money.

The police shouldn't be sharing your identity as the tipster, and I hope they don't, but it sounds like people are already assuming it's you with our without information from the police.

911 recordings are normally public records, so if somebody knows the date the call was made and the police have not yet reused the tape or discarded the recording, they may be able to listen to the call and identify your voice. I doubt that somebody would go through that much trouble.