Best modern-day true crime author/sleuth? (serial killer, job)

[KsStorm]

If you were to seek out/recommend someone to sleuth a crime, who would you choose? Seeking someone who is very sharp, who will dig in deep & get the job done, really find the real story...?
If Ann Rule & Vincent Bugliosi married & had a child with all their talents...? Where might one find someone that could really get the job done, get to the bottom of an unsolved crime?

[HappyDogToday]

You already answered your own question: Ann Rule is the best crime writer, period.

[krazykatlady]

Ann Rule rules!

[pvande55]

Ditto on Ann Rule. She brings enough additional information to keep your interest. Without getting boring. Amazing that so much happens in her home base the Pacific Northwest. Even more that she once worked with serial killer Ted Bundy.