Were led (e4gonto). Imperfect passive of agō, were being led.
Malefactors (kakourgoi). Evil (kakon), doers (work, ergon). Old word, but in the N.T. only in this passage (Luk 23:32, Luk 23:33, Luk 23:39) and 2Ti 2:9. Luke does not call them “robbers” like Mar 15:27; Mat 27:38, Mat 27:44.
To be put to death (anairethēnai). First aorist passive infinitive of anaireō, old verb, to take up, to take away, to kill.