"The Titans Kill a Saint" continues in Teen Titans (1966) #26. First appearance of Lilith Clay.
*At a discotheque in their civilian identities, the Teen Titans encounter Lilith, a mysterious telepath/precognitive who uncovers their super-hero selves and warns them that "tonight the Titans will open the door for death." Ignoring the cryptic prediction, the Titans soon find themselves involved in preventing a riot at a peace rally, fighting side-by-side with the Hawk and the Dove. In the midst of the action, while struggling with a gun-wielding protester, Hawk, Dove, and the Titans (with the exception of Robin, who has gone to alert the police) all have a hand on the weapon that discharges and kills world-famous philanthropist Doctor Arthur Swenson.
After being reprimanded for their part in the killing by their Justice League mentors, the young heroes are recruited, through Lilith, by Mr. Jupiter, one of the world's richest men and the financier of a secret government-sponsored training project for teenagers. Robin declines Mr. Jupiter's offer in order to pursue his own career and attend college, but Kid Flash, Wonder Girl, Speedy, Hawk, and Dove, together with Lilith, become students in the new program, forsaking their costumes and super-powers for the duration and taking a vow of pacifism. *Source: Official Teen Titans Index #2 - Published by ICG