<P> After the events of Zero Hour: Crisis in Time, it is revealed that Eobard's ancestor, Malcolm Thawne, was Barry Allen's long - lost twin brother, meaning that Barry is Eobard's great uncle . </P> <P> In 2009, Eobard Thawne was re-imagined as a major villain in the DC Universe by writer Geoff Johns in The Flash: Rebirth . His resurrection is foreshadowed to occur in a near - future event, after which he would be responsible for Barry Allen's return and transformation into the Black Flash . It is later revealed that because Thawne recreated the accident that gave Barry his powers, he was able to lure Barry out of the Speed Force during the Final Crisis and temporarily turn him into the Black Flash . </P> <P> When Thawne reappears, he murders the revived Johnny Quick, before proceeding to trap Barry and the revived Max Mercury inside the negative Speed Force . Thawne then attempts to kill Wally West's children through their connection to the Speed Force in front of Linda Park - West, only to be stopped by Jay Garrick and Bart Allen . Thawne defeats Jay and prepares to kill Bart, but Barry, Max, Wally, Jesse Quick, and Impulse arrive to prevent the villain from doing so . In the ensuing fight, Thawne reveals that he is responsible for every tragedy that has occurred in Barry's life, including the death of his mother . Thawne then decides to destroy everything the Flash holds dear by killing Barry's wife, Iris, before they even met . </P> <P> As Barry chases after Thawne, Wally joins him in the time barrier . They reach him, and in doing so they become the lightning bolt that turns Barry into the Flash as they are able to stop Thawne from killing Iris . The Flashes push Thawne back through time, showing his past and future . They return to the present, where the Justice League, the Justice Society, and the Outsiders have built a device originally intended to disconnect Barry from the Speed Force when he was the Black Flash . Barry tosses Thawne in and Jay activates the device, severing his connection to the negative Speed Force . As the Flashes tie him up to stop him from running, back in the past Iris discovers Thawne's weapon and keeps it . </P>

Who killed the flash's mother in the comics
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