Only if they have probable cause to believe you've committed the crime. Once they have probable cause, they can arrest you in a number of ways:
- They can make a lawful arrest. If you're arrested and are in custody, your arraignment generally must occur within 24 hours;
- If they believe you're not a risk to flee the area, they may send you a letter in the mail asking you to appear for an arraignment; or they may ask you to voluntarily surrender yourself at the police station.