Not exactly a copyright violation
People just get tired of copycat songs and they don't care.
Wasn't the song duly licensed? They are feds, after all. Not a legal issue then, but every song or artistic work has an author or creator, and if the artists are outspoken and actively oppose the messages which the users and licensees of their works are attempting to convey to a wider audience, then the use or licensing of the "hostile" works is a self-defeating proposition.
Singers ard songwriters are ultimately replaceable, "fungible" labor in an ever-shifting popular culture.
DHS agents can compose and sing their own songs if they do not wish to offend content creators. There are, after all, "Singing Sergeants" in the Air Force.
People who have stressful jobs sometimes need a break or something calming or soothing to do. Skip the benzodiazepines and sing a song to control your anxiety or something.
Alpha males in mission critical jobs really shouldn't be brought to their knees with consumer dependencies on red pills and blue pills, regardless of tastes in music or peace and quiet without music or birds twitters or white noise or crickets, whatever. Conspiracy theories and medications and all that.