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Karl P. Cullen (Identification Number: 6167-07) is a mentioned character in Doom 3. A member of Delta Lab's security force who was assigned to the Monorail on Mars, an automated turret was installed in his station near the entrance of Delta Labs Sector 1. The automated turret caused complaints from the employees in the vicinity that Cullen decided to pass them the shutdown codes of the turret, thinking it will do more harm if it was operational. During the demonic invasion, the automatic turret in Cullen's station started to malfunction, gunning down anything that moved in its vicinity. Given his position as a Mars-Sec, it is likely Cullen turned into a Z-Sec as his PDA can be found in the Monorail Security area, guarded by a couple of Machinegunner Z-Secs. His PDA contains codes to shut down the turret, as well as the same code for two cabinets next to his office.

PDA contents[]

Emails[]

New Automated Defense System (10-06-2145)[]

Mr. Cullen,

Please inform your team that an automated security turret gun will be installed at the main entrance to Delta. This is due to the increased sensitive nature of the experiments and the security problems we've recently had.
Please ensure that your team members have correct security clearance and are in the IFF database. We don't want a repeat of the problems we had when the guns were installed at Marine Command.

Thank You,
Central Security Authority

RE: Turret Shutdown Codes (10-12-2145)[]

Thanks, I freaking hate loaded guns with an automatic IFF.

----Original Message----
Sent: 11-11-2145
To: All Security Personnel

Guys,
I've encoded the shutdown sequence for the turret gun into my PDA, you can use it at the security terminal near the metal detectors if there are any problems with the gun.
I would rather have it off-line then killing anyone...

Thanks,
Karl

Extra Medical Supplies (11-02-2145)[]

Karl,

As the medical supervisor in this section I feel it's my obligation to be proactive in regards to safety especially now that we have a turret gun in a heavy traffic area. As a precaution I've stocked medical supplies in the storage cabinets adjacent to the security office. Both cabinet codes are 364. I hope we never need them.

Lee Pommeroy
Medical Supervisor

Mounting brackets fixed (11-04-2145)[]

Karl,
I fixed the mounting brackets this morning; it was those damn Mixom bolts again. I really wish the UAC would find a better sub-contractor.

Thanks,
Sam

Additional Security Needed (11-09-2145)[]

Mr. Cullen,

We are going to be transporting a large specimen from Delta. Normally we would not be using the Monorail, but we need to get it to Phobos Labs and this is our only option.

The specimen will be sedated, however given both the importance and the hazardous nature of it, we feel it is prudent to have an enhanced security presence. You and your men should be prepared with full armor and plasma guns. However, lethal force should be only used as a last resort. Bringing this thing alive through the teleporter cost seven men their lives and it would be a shame to waste that effort.

Also, as you know there are plenty of rumors about our specimens. I do not want this to get out of control. Information about this transport must be kept to only those that need to know what is in the container.

Thank you for your cooperation in this.

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