A judge has set a date for the trial for a mother charged with murder in the death of her 3-month-old son.

Police arrested 21-year-old Alexandra Tobias in January.

Investigators said she admitted to shaking her baby three times after his crying interrupted a game she was playing on Facebook. Police said the baby's head could have hit the computer.

According to police, Tobias went outside to smoke a cigarette, and while she was out, the family dog knocked the boy off the couch.

Investigators said when she came back in, the boy cried again and police said she admitted to shaking the boy again, causing him to stop breathing.

Investigators said the boy had a head injury and a broken leg.

Police first arrested Tobias on charges of aggravated child abuse, but after her son died the next day, they added the charge of murder.

Tobias' trial is scheduled to begin on June 28.