It Depends...
A check is valid only for 90 days (180 in some countries), so you cannot hold a check beyond this date
plus
Since the check issuing person is dead, the check should have been issued to you before the date he/she died. so if they issued you a check on April 1st and died on May 1st, you have until June 30 to cash it, after which the check will become stale or useless
zero days
That depends on how bad/serious the crime was.
Property Management company can only 5 days hold a rent check.
6. Days
10 Minutes
depends how long you can hold your breath for
a long time
it takes someone 5 to 10 seconds to wake up after they have been put in the sleeper hold
the world may never know
You can sell it immediately if it is your car titled in your name.
26 secounds
depends on your phone contract and what company. Check with the dealer or the company. If you are on hold for too long or can't reach the dealer, check your contract your self.