What do detectives mainly rely on in a case?

Answer 1

he wrote down possibilities then crossed out the ones that didn't apply

"when you have eliminated the obvious whatever remains no matter how unlikely must be the truth." -Sherlock Holmes

Sherlock Holmes also used psychological profiling a technique not used by real detectives until many decades later. And in A Study of Scarlet he even discovered a more efficient way of blood typing any blood found at crime scenes.

Answer 2

The use their freaking hands and legs to walk around the roses and they do the harlem shake to the hot people and they feel free!