The band had become inactive on social media and Sleeper Agent had not played any shows for the majority of 2015 with the only news to come out from the members was news of side projects and Alex Kandel being a possible contestant for the show The Voice, although she had once tweeted about the band possibly having new material back in May 2015. On September 29, 2015 Tony Smith had posted a picture of the band on Sleeper Agents Facebook and Twitter reading "2010-2015". Tony had posted with the picture "The 5 best years of my life... so far." - Lurve, @tnysmth". He had also stated in another post on Twitter "Cat's officially out of the bag. Sleeper Agent aren't together anymore. There's no bad blood and we're all still friends. #neversaynever" officially stating that the band had broken up. Finally Alex stated as well that the band "hit this plateau and we decided to part ways and try other things." She talked about the band in the past tense and said her time in Sleeper Agent is over. As of September 29, 2015, Alex had appeared on NBC's The Voice as a contestant choosing to work with Gwen Stefani. The band's official Facebook profile lists a number of bands as their influences, including The Pixies, The Black Lips, Foxy Shazam, and Cage the Elephant, the latter being another part of the growing Bowling Green, Kentucky music scene and close friends with the band. Rolling Stone described the band as "Shaggy Kentucky kids whose songs are sweet, fizzy and combustible as a can of shook soda." "They are the best people on earth," states Matt Shultz of Cage the Elephant. The band's spontaneous, energetic sound can be traced to an incident at a Fourth of July party, when drummer Justin Wilson was sucker punched by the drummer of a rival band, inspiring Wilson to channel aggression and his punk attitude into his playing.