A San Antonio man shot his roommate in the backyard of their shared home. Then he walked away with a beer in his hand. The next day, he walked up to police and told them what he did.

Julio Castro is now charged with murder in the death of David Rodriguez Cabrera.

The shooting happened at the home the two men shared in San Antonio. Castro pulled out a gun and shot Rodriguez Cabrera in the backyard. After the shooting, Castro did not run. He did not call 911. He walked away carrying a beer.

Rodriguez Cabrera died from his wounds.

The next day, Castro did something that surprised cops. He walked up to police officers on his own. He told them, "I did something."

That was enough for cops to bring him in. Once they started asking questions, the full story came out. An arrest warrant was filed based on his own words.

When cops searched Castro, they found something else. He had a bus ticket to Dallas in his pocket. He was set to leave San Antonio. Whether he planned to run or had another reason for the ticket is not clear from the warrant.

Castro is now behind bars facing a murder charge. In Texas, murder is a felony that can mean 5 to 99 years or life in prison.

Cases like this one don't happen often. Most suspects try to flee or stay quiet. Castro did the opposite. He stayed near the scene after the shooting. Then he walked up to cops the next day and told them what he had done.

The case is now in the hands of the Bexar County District Attorney's office. Prosecutors will likely use Castro's own words as key evidence at trial.

Rodriguez Cabrera's family has not made any public statements. The two men were roommates, which means they knew each other well. What led to the shooting is still being looked into by San Antonio police.

Investigators have not said if anyone else was home at the time. They have not named any witnesses to the shooting.

Castro remains in jail. No trial date has been set. The case will go before a grand jury, which will decide if there is enough for a formal indictment.

The words "I did something," said to officers on a San Antonio street, are now at the center of everything. Prosecutors will argue those words show Castro knew exactly what he had done. Defense lawyers may try to challenge how that statement was taken and what it means under the law.

For now, a man is dead. His roommate is in jail. And a short sentence said to a cop on the street may decide what happens next.