The 14-year-old boy accused of killing his 7-month-old sister has been transferred to a juvenile detention center in Montgomery County and ordered held without bond.
The eighth grader has been charged as an adult, but that could change when another hearing is held later this month.
FOX 5 is not naming the teenager, even though he has been charged as an adult.
Montgomery County police say the eighth grader admitted beating the child before smothering her to death.
The 14-year-old appeared in court via closed circuit television from the county jail where you could see he was dressed in a green jumpsuit. He said nothing other than acknowledging his name.
In a brief exchange between prosecutors, the defense and the judge, new details about the investigation were revealed before all sides agreed to come back for another hearing in 10 days.
Inside a basement apartment in the 11600 block of Lockwood Drive in Silver Spring, police say the mother of the baby found her unconscious early Friday morning and called 911.
In District Court in Rockville on Monday, prosecutors told the judge the baby was asphyxiated and the wounds on the body were post-mortem bug bites.
"In the charging document, you will note there were statements were made to the police during interrogation that he indicated to them that he did in fact strike the child," said State's Attorney John McCarthy. "That's in the charging document. However, the injuries observed on the body were thought by the police initially to be indicative of that beating. But as officers of the court, we told the court that we've learned from the medical examiner that these were not injuries, they were bug bites that occurred after the child died."
Police say after smothering the child, the 14-year-old, who was also caring for a 3-year-old female, left the 7-month-old in a car seat inside the apartment.
"According to the process that is in place in the state of Maryland, a full study will be made," said McCarthy. "That study will be returned to the court and a determination will be made as to where this matter will be tried in adult or juvenile court, and will be made in open court after in fact that study is completed."
Although the teen was represented by an attorney in court, there were no friends or family in attendance.
The teen's defense attorney told the judge the child was responsible for caring for the 7-month-old and a 3-year-old while his mother worked the overnight shift. He would then go to school when his mother returned.
The attorney also noted the teen has had no contact with police until now.