If you are at least 17 on the date of an incident, in Texas you are an adult for criminal law purposes. Criminal cases can be filed immediately upon arrest by police agencies. Criminal Cases can also be filed "after the fact" (later, but within a limited "Statute of Limitations" time period prescribed by Article 12, Texas Code of Criminal Procedure) by prosecutors, such as a County Attorney, District Attorney, or a City Prosecutor. In my experience, ethical law enforcement officers (including police and prosecutors) will generally only charge a defendant with a crime if they believe (1) the Defendant actually committed a crime, and if they believe (2) they will have the evidence and testimony needed to win. There are exceptions to this, such as when there is an undercover cop involved whose identity needs to remain hidden. Another exception would be if police believe that releasing a suspect would lead them to a bigger arrest. In your case, I don't have enough detail to give you an opinion, but I will say that every day that goes by with no charges filed is a good day. Also I recommend that you stay out of trouble and off the radar during this time. I'm not suggesting that you hide, but avoid situations, places and people that could put you at risk.
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