[5] The magazine led to an offer to write a story for the Long Island Voice, which was his first paid job in journalism.

[8] He was the head of digital operations and an on-air reporter for the television series Crime Watch Daily.

[13] After the passing of true crime author Michelle McNamara in 2016, Jensen collaborated with Paul Haynes and Patton Oswalt to finish her book I’ll Be Gone in the Dark, which was published in 2018.

[6] Alongside fellow investigative journalist Alexis Linkletter, Jensen co-hosted the Discovery+ podcast and television special Unraveled: The Real Story of the Long Island Serial Killer, which was released in 2021.

[7][15][18][20] In the book, Jensen wrote about his experience investigating crimes, including his use of electronic tools such as social media and geotagging to identify murder suspects.

[21][22] In the book, Jensen explored the homicides of several women in Columbus, Ohio amid the opioid epidemic.