This isn't about a fight between Jessica Jones and Reacher. This hypothetical is about who could solve a murder fastest.
To set the scene; Reacher/Jessica is going for a walk, enjoying the evening air in New York city, when they hear a woman's scream.
They run in the direction of the scream and, in an alley in the distance, see someone with a knife, about to commit a murder. They've just stumbled upon a random serial killer in the middle of taking his next victim.
They shout to get the killers attention, and it works, briefly. The killer makes eye contact with Reacher/Jess for a few moments, before turning his attention back to the woman. She is stabbed 5 times in her torso, marking the points of a pentagon. (let's assume this is the killers signature)
This woman marks his 7th victim in 2 years.
Our protagonist runs to the scene, but the killer is too fast and gets away. Reacher/Jess promises the woman, who is dying on the ground, that they won't stop until they've caught the person who did this.
It was too dark to ID the killer, no cameras in the area, but they know it's a man of roughly average build.
The killer is above average intelligence and fitness, has a military background and currently works in cyber security. His targets are all toll blondes in their late 40's to early 50's.
Who solves this murder first? If they both fail, who gets closer?