John "Jack" McEvoy is a literary character created by Michael Connelly in the 1996 novel The Poet and starring again in the sequel The Scarecrow thirteen years later.
After exposing the serial killer known as the Poet, who had murdered Sean as well as several other cops across the country, he moved to Los Angeles, while Walling was transferred due to their unprofessional relationship.
While revisiting a seemingly standalone murder case, McEvoy discovered the chain of killings by a serial killer later titled the Scarecrow by the media, eventually coming back into contact with Rachel Walling and reinstating their relationship.
Following his departure from the newspaper, he wrote another novel, this time covering the Scarecrow case, and joined The Velvet Coffin, an online investigative journalism publication.
In 2020, while working for the watchdog news website FairWarning, McEvoy reconnected with Walling to investigate a series of similar killings across the country by a serial killer under the moniker the Shrike.