Frank Deleon Jr., 17, was taken into custody earlier this week after allegations that he failed to comply with curfew requirements.
Under his bond conditions, Deleon cannot have contact with anyone involved with the case, including the other alleged girlfriend, any witnesses or their family members. He was granted house arrest with a GPS monitor.
But in an update on Wednesday, records showed his bond was reinstated and he was released. It's believed there was a glitch in Deleon's GPS monitor and he did not leave his home, according to the Harris County District Attorney's Office.
"We are not happy with this decision and with the people who made this possible. Frank (Deleon) has proven to be a danger to the Alvarez Family. We had petitioned for him to remain in custody so that the family could be in peace. Diamond did not get a second chance, why should he? We need answers," said FIEL's executive director, Cesar Espinosa, said on Tuesday.
Houston investigators believe the 15-year-old victim was gunned down in her neighborhood park on Jan. 11 by her boyfriend, Deleon, after she found out he was cheating, according to court documents.
In court, prosecutors said that when officers arrested Deleon, a suitcase was found in his room, packed with enough belongings for more than an overnight trip.
RELATED: 15-year-old girl shot and killed as she walked dog in SW Houston
Deleon posted his $250,000 bond on Jan. 19 after being charged with Alvarez's murder, according to court records.
Booking photo of Frank Deleon, Jr., charged with murder in the 174th State District Court. pic.twitter.com/BX7g41qyHO— Houston Police (@houstonpolice) January 18, 2022
RELATED: 'Why is he free?': Family of Diamond Alvarez demands murder suspect be returned to jail
According to family members, Deleon was violent against Alvarez in the past, including punching her in the face and pointing a gun at her.
The couple was together for six or seven months, and the relationship had recently ended, the prosecutor said in court.
RELATED: 17-year-old boyfriend charged with murder of 15-year-old girl in SW Houston posts $250K bond
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NOTE: There have been discrepancies with the victim's age. HPD reported she was 16 years old, but family members told ABC13 she was 15.