Answer:
A warrant is issued for the defendant's arrest
Explanation:
This type of warrant is called a bench warrant or a failure to appear. In most cases, if a person is arrested on a failure to appear warrant, they are held in jail until they go in front of a judge. The judge will usually then hear the original charge(s) and sentence the individual on those charges.
You need to be able to have rock hard evidence to put a criminal away depending on the jury and what they think but in most cases you need evidence that can for sure put them away.