The U.S. state of Alabama has decided not to execute convicted murderer Alan Miller by lethal injection after a botched execution attempt in September, and instead will use a different method of execution, local Al.com reported, citing court documents.

In September, U.S. authorities halted the execution of Miller, who was convicted of killing three people in 1999 because they could not find his vein in time to administer the lethal injection. The killer had to be returned to a prison cell.

Any future attempts to carry out the death penalty against Miller can only be accomplished by nitrogen hypoxia, the portal quotes the text of the documents as saying.

Last week, Alabama Governor Kay Ivey asked for a stay of state executions․