Josh Lee, an attorney for the death row inmates who challenged the law, declined to comment Friday.

During oral arguments last week, Lee said the state would have two options if the court found the law unconstitutional.

"The Legislature could either choose to stick with the 1983 statute, which everybody concedes is constitutional, or the Legislature could decide we want to amend it." Lee said last week.

The state adopted lethal injection as its method of capital punishment in 1983. There have been legal challenges to the way the state kills its condemned prisoners since then. In 2009, in the midst of a legal battle over lethal injection, the state Legislature passed the law that the court struck down Friday.

Joseph Cordi, an attorney for the state, told the Supreme Court last week that he thought the state would be left with the earlier law if the court struck down the entire statute.

Part of the 2009 law also says that in the event it's found unconstitutional, death sentences will be carried out by electrocution.