With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Robin, Batman's vigilante partner, has been a widely recognized supporting character for many years. Bill Finger stated that he wanted to include Robin because "Batman didn't have anyone to talk to, and it got a little tiresome always having him thinking." The first Robin, Dick Grayson, was introduced in 1940. In the 1970s he finally grew up, went off to college and became the hero Nightwing. A second Robin, Jason Todd, appeared in the 1980s. In the stories he was eventually badly beaten and then killed in an explosion set by the Joker, but was later revived. He used the Joker's old persona, the Red Hood, and became an antihero vigilante with no qualms about using firearms or deadly force. Carrie Kelley, the first female Robin to appear in Batman stories, was the final Robin in the continuity of Frank Miller's graphic novels "The Dark Knight Returns" and "The Dark Knight Strikes Again", fighting alongside an aging Batman in stories set out of the mainstream continuity.
text_B: Would Red Hood feel guilty if he killed a criminal while fighting them?
NO.