1. Don't say anything. In most plays, everyone has a secret. If you reveal some secrets in advance, other players will relax their vigilance against you.
2. Reveal your grievances with the deceased in advance and dilute the motive for killing. For example, if the deceased is your father's enemy, then you can dilute this motive and turn the deceased into your creditor. There's no need to kill people when you get the money.
3. Create your own way of working. You can say that when you do something, the deceased has stopped moving, confusing people and making them unable to choose between multiple suspects.
4. Reduce the hostility between yourself and other players and try to wash away the bad things you have done before.
When you vote for a murderer, let everyone canvass and try to let everyone vote for the suspect in their hearts. If they want to vote for you, try to change the subject and let everyone do more.