In order to be a detective you must first work as a regular patrol officer to experience frontline policing and investigating for a number of years. Then, if the department/service sees fit, you can become a detective.
As a result, you will more than likely see your fair share of blood as a frontline police officer. As a detective however; exposure will be cut considerably as the frontline police officers will be the ones doing the grunt work.
HOWEVER. If by "work" with blood you mean do tests or whatever, then no, detectives don't do that. That's what CSI teams do (no, they are not detectives; or even cops for that matter) and forensic specialists.
The cast of Blood Detectives - 2008 includes: Sylvia Chase as Narrator
Psychic Detectives - 2004 Bonds of Blood 4-3 was released on: USA: 22 February 2006
Yes. Often.
being a pimp
Scientific detectives
At and for the police department or law-enforcement agency.
Because they work round the clock.
Yes. There are always police officers available.
Generally detectives are salaried officials within a Police Department. They generally work awkward hours and hourly pay would be very expensive.
Private Detectives
because they work round the clock
scientist are like detectives because detectives try to figure things out like scientist.They are like scientist because they have to be really smart