Star Trek: Deep Space Nine, Season 4

[Sisko enters Leyton's office pointing a phaser at him]

Admiral Leyton:
Are you planning on using that?

Benjamin Sisko:
Against a fellow officer? I hope not. [Takes off Leyton's combadge] But I will have to ask for your resignation.

Admiral Leyton:
You'll forgive me if I don't leap at the opportunity.

Benjamin Sisko:
I have enough evidence to convict you of treason. We have Lieutenant Arriaga in custody on the Defiant, and he is ready to admit that under your orders, he attached a subspace modulator to the relay satellite on the far side of the wormhole. That's why it was opening and closing at random.

Admiral Leyton:
Why would anyone want to do that?

Benjamin Sisko:
To make it look like a cloaked Dominion fleet was coming through the wormhole. That way, when Earth's power relays were sabotaged, people would think that an invasion was imminent.

Admiral Leyton:
That's a very interesting theory, but it's not going to do you much good. Lieutenant Arriaga isn't going to get to Earth. I've sent the Lakota to intercept the Defiant.

Benjamin Sisko:
You really think one Starfleet starship will fire on another?

Admiral Leyton:
As far as Benteen's crew is concerned, the Defiant isn't a Starfleet ship. They've been told that everyone on the Defiant 's been replaced by Shapeshifters.