OKLAHOMA CITY (AP) — Oklahoma had conducted 112 executions from 1976 to October 2015, when the state imposed a moratorium following three consecutive flawed executions or attempted executions. Here is a look at those and other issues surrounding capital punishment in Oklahoma as the state prepares to resume lethal injections.

— April 29, 2014: Clayton Lockett writhed and groaned on the gurney as Oklahoma used the surgical sedative midazolam for the first time during an execution. Then-state prisons director Robert Patton halted the execution process, but Lockett died 43 minutes later. The stat...