The Poison Pen

It is said that the pen is mightier than the sword, but what if the holder of the pen loses everything and in retaliation takes up his sword against the people who have wronged him?
One day the FBI is attacked and two of its agents are killed. Soon after, the FBI headquarters is rocked by an explosion coming from a secret room deep inside the bowels of the building. This place is only known to a few as the time room.
As information is gathered regarding these incidents, the director of the FBI calls in those who have reason to know about the Time room, and soon the evidence leads to a rogue Time Traveller and author.
But what can be done without a time machine to hunt this man? They need help and one of the FBI agents is holding onto a secret that could assist them: Brian Partridge is alive.