'Horrific': Teen accused of killing 15-year-old girl, her 9-year-old brother in Baltimore, officials say

Key Points:

• A 16-year-old, Keith Maurice James Jr., was arrested and charged with two counts of first-degree murder and one count of firearm use in connection with the July 7 fatal shooting of siblings Steve Allen, 9, and Giovanna Myrie, 15, in their Gwynn Oak home.
• The children's mother discovered their bodies and called 9-1-1; police investigations revealed that James had been inside the home days prior, allegedly hanging out with Myrie while armed.
• Evidence including witness statements, cell phone data, and surveillance footage linked James to the crime, showing his presence near the home around the time of the murders and his travel to and from the scene by bus.
• Investigators noted a possible relationship between James and Myrie, with reports of threatening behavior and text messages warning Myrie against seeing other boys, highlighting concerns about teen dating violence.
• James is being held without bail as authorities continue to build a strong case due to the suspect's age, with no attorney information currently available.