A Duval County grand jury on Thursday indicted four people on murder charges, including a young mother accused in the abuse death of her 3-month-old son.

Alexandra Tobias, 21, appeared before a judge Friday morning on charges of aggravated child abuse and murder and was ordered held without bond.

Tobias is accused of shaking 3-month-old Dylan Edmondson so hard he was hospitalized with a head injury and broken leg. He died at the hospital.

According to the arrest report, Tobias admitted to shaking the baby because he was crying while she played a game on Facebook. Police said Tobias shook the baby three times, and the baby's head could have hit the computer.

In other indictments released Thursday included:

• Malcolm Thrower, 17, who is accused in the stabbing death of 58-year-old Marilyn Russell in Baldwin.
• Thomas Lester, 53, accused in the beating death of his mother, 81-year old Vivian Williams.
• Jonathan Hartley, 15, who is accused in the shooting death of pizza delivery driver Sarah Hotham.

Previous Stories:

• January 21, 2010: Mother Accused Of Shaking, Killing Baby
• January 21, 2010: Teen Arrested In Baldwin Woman's Stabbing
• January 20, 2010: Son Arrested In 81-Year-Old's Death
• December 7, 2009: Teens Charged In Slaying Of Pizza Driver