<P> Dan survives the fire , but the dealership is destroyed . Dan at first thinks it was Lucas who tried to kill him when he remembers seeing him in the fire , but it is revealed that Lucas saved him . Wanting access to the fire investigation , Dan runs for mayor of Tree Hill . His family - based campaign includes having Deb pretend to love him in exchange for a final divorce . This ploy works and Dan is elected mayor . As mayor , Dan gains access to CCTV showing Keith buying the whisky used to drug Dan , and when Keith returns to town Dan has him arrested on suspicion of his attempted murder . Although the police release Keith due to lack of evidence , Dan still believes that Keith was the perpetrator , and things become worse when Keith announces that he is going to marry Karen and adopt Lucas . One day at Tree Hill High , Jimmy Edwards takes a gun to school and fires it , causing a lock down . Keith persuades Dan as mayor to let him go into the school to talk to Jimmy , but Jimmy commits suicide by shooting himself in front of Keith . Dan then gets into the school , picks up the gun and shoots Keith , killing him . Jimmy gets the blame for Keith 's death as it is assumed that he shot Keith before turning the gun on himself . Dan convinces himself that Keith deserved what he got as he started the war with Dan . Nevertheless , Dan becomes haunted , seeing visions of Keith as a child everywhere , and this has a profound effect on him . Realizing he has to change his ways he tries to get closer to Nathan , telling his son that he is proud of him and that he loves him . Haley then gives Dan a second chance by inviting him to her and Nathan 's second wedding . At the ceremony Deb tells Dan that it was her , not Keith , who tried to kill him in the fire . Dan goes to Keith 's grave and breaks down . Dan then apologizes to Karen for how he treated her and Lucas and she reveals that she is pregnant with Keith 's child . Dan takes her in his arms promising to be there for her this time . He then goes home and discovers that someone has written `` MURDERER '' on his wall . </P>
<P> Dan survives the fire , but the dealership is destroyed . Dan at first thinks it was Lucas who tried to kill him when he remembers seeing him in the fire , but it is revealed that Lucas saved him . Wanting access to the fire investigation , Dan runs for mayor of Tree Hill . His family - based campaign includes having Deb pretend to love him in exchange for a final divorce . This ploy works and Dan is elected mayor . As mayor , Dan gains access to CCTV showing Keith buying the whisky used to drug Dan , and when Keith returns to town Dan has him arrested on suspicion of his attempted murder . Although the police release Keith due to lack of evidence , Dan still believes that Keith was the perpetrator , and things become worse when Keith announces that he is going to marry Karen and adopt Lucas . One day at Tree Hill High , Jimmy Edwards takes a gun to school and fires it , causing a lock down . Keith persuades Dan as mayor to let him go into the school to talk to Jimmy , but Jimmy commits suicide by shooting himself in front of Keith . Dan then gets into the school , picks up the gun and shoots Keith , killing him . Jimmy gets the blame for Keith 's death as it is assumed that he shot Keith before turning the gun on himself . Dan convinces himself that Keith deserved what he got as he started the war with Dan . Nevertheless , Dan becomes haunted , seeing visions of Keith as a child everywhere , and this has a profound effect on him . Realizing he has to change his ways he tries to get closer to Nathan , telling his son that he is proud of him and that he loves him . Haley then gives Dan a second chance by inviting him to her and Nathan 's second wedding . At the ceremony Deb tells Dan that it was her , not Keith , who tried to kill him in the fire . Dan goes to Keith 's grave and breaks down . Dan then apologizes to Karen for how he treated her and Lucas and she reveals that she is pregnant with Keith 's child . Dan takes her in his arms promising to be there for her this time . He then goes home and discovers that someone has written `` MURDERER '' on his wall . </P>
who burned down the dealership in one tree hill
who burned down the dealership in one tree hill
Deb
Deb