Thanks, so are you saying that in the situation you described, the prosecutor tries to get an indictment quickly so that the defendant does not get released before arraignment? If so, it sounds like grand juries are only convened for a day or two?
The 48 hour hold is used in some states to detain an arrestee (a mere suspect if you will), to allow police to gather ENOUGH evidence to lodge a formal complaint and an arrest warrant.
I have thought for many decades that such holds are unconstitutional.
If the police can't charge, they MUST release the suspect.
TN has long held the 48 hour hold policy, along with LA, and smattering of other states.
Well, the 48 hour hold policy is headed to the US Supreme Court, you can read all about it here:
Memphis's 48-Hour Investigative Hold Policy Heads to the Supreme Court - Supreme Court of Tennessee Blog
Don't confuse probable cause with reasonable suspicion.
Probable cause usually is grounds for a warrantless search or seizure, but reasonable suspicion is not.
The line between reasonable suspicion and probable cause has been at the forefront of numerous Supreme Court cases, but the simplest distinction is:
Reasonable suspicion exists when the likelihood of criminal wrongdoing would be apparent to a trained police officer.
Probable cause exists when the likelihood of criminal wrongdoing would be apparent to any reasonable person.
The reasonable person test has long been the arbiter of arrest or release.
It is also the standard most prosecutors adhere to and practice daily.
Let's wait and see what the Supremes decide.
The last time the Supremes took such a case, (back in 1991) they upheld 48 hour holds for mere suspicion, absent probable cause.
Justices Say Suspects Can Be Held Up to 48 Hours Without Warrant