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This Is Fake DIY

One of Us Is the Killer is the fifth studio album by American mathcore band The Dillinger Escape Plan, released on May 14, 2013.One of Us Is the Killer is the band's second release under their Party Smasher, Inc. imprint. The CD was released as a standard version that can be picked up at most record stores, and a limited version with a scratch-off cover that can only be bought at Best Buy containing two bonus tracks.

Greg Puciato indicated that he chose the album title "pretty much as soon as I finished writing [the] song" of the same name. He explained that the meaning behind the title involves "a lot of issues on the album relate[d] to co-dependency and unknowingly destroying a relationship and taking responsibility for that and not pointing outward. The chorus of the song says 'one of us must die, but the killer won’t survive.' In a relationship, you're both fifty percent at fault. It's about accepting responsibility instead of directing it outward."

Puciato arrived at this view as a result of "two really critical relationships in my life that were under a lot of strain" while the album was being written. He acknowledged that the relationships were with guitarist Ben Weinman and his girlfriend, which he described as in "a state of turmoil" and "unhealthy".

Prior to recording One of Us Is the Killer, the band essentially constructed a studio around its practice space. Vocalist Greg Puciato noted that the album "took a lot longer" to record, with the band members recording their respective instruments on consecutive days rather than alternating: "This time we did it traditionally and everyone tracked their instruments in succession. So I spent 25 days in a row recording vocals," said Puciato. He explained that this helped him to concentrate on how he delivered the vocals:

I thought it would be a real detriment, because after three or four days I would start to sound different. But it was the opposite. For some reason, being able to completely immerse and not poke your head out every two or three days really allowed us to go down the rabbit hole and keep the microscope on the vocals without having to switch gears. I think we ended up with better vocals because of that.

In contrast to their previous releases, previews of material slated to be on the album prior to its announcement were scarce. The band announced the album title and cover on their Facebook page on February 18, 2013. The first single from the album, "Prancer", was released on the iTunes Store, Google Play, and Amazon MP3 on March 12. On April 1, the band shared a preview of the album on Facebook, released by the label on YouTube on March 31. An official music video for the second track, "When I Lost My Bet" was released on YouTube on April 23, 2013. The album was streamed in its entirety on May 12.

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