The electric chair is/was a horrible invention. IIRC it was created back when electricity was the new wondrous thing that'd make everything easy (and it did make lots of things easy).
But as a humane, civilized way of execution it has no place. Takes too long and if anyone like I have bothered to read about how it kills (and the time it takes), they'd know that the electric chair is not far from burning at the stake.
A civilized state must have the right to punish, but the electric chair is beyond that. It's cruel vengeance.
The wife shouldda been thrown in jail for not reporting her husband's activities, but evidence, including released old Soviet documents, strongly indicate that she knew about her husbands activities, might have supported them, but refused the Soviets attempt to get actively involved. She might have died because she loved her husband and just wanted to support him. Or she was a commie symphatizer. Doesn't seem like she was a great spy though.
Anyway, am glad you Yanks have found more effective ways of killing people rather than using the electric chair.