Precedent in applying old law rather than new law?

[beatboo]

Hello everyone.

I wonder if there is a precedent, where a defendant has challenged the state, so he can be held accountable and sentenced using a previous law rather than a new law?

For example: someone committed an offense, at the time of the offence the law says that he must serve 3 years in prison, but, a year later the law has been extended to 6 years in prison.
My question is, is there a case where a defendant has reversed his sentence to 3 years rather than 6 years, due to the fact that the date the offence has been done when the law was for 3 years?

Thx

[R0b]

You shouldn't need a precedent. Crimes committed are punishable according to the law at the time (same for civil law), unless the newer law applies retrospectively but in criminal law, that rarely if ever happens.

If you want a proper answer, you are going to have to give some context and provide the legislation you are referring to.