MIAMI -- Frustration and anger boiled over Thursday night outside the Northwest Miami-Dade home where, according to police, a 6-month-old baby boy was beaten to death on Tuesday.

Relatives of the infant’s mother and father gathered at the home, where a heated discussion over where to point blame took place.

The baby’s mother has not been charged with a crime, but her boyfriend, 24-year-old Watson Dorval, was arrested and charged with second-degree murder in connection with the baby’s death.

An autopsy revealed the baby died of blunt force trauma.

"I feel like the detective should look hard into this case because he did not beat that baby,"said Shelda St. Vim, the suspect’s sister. “Of course they show the baby was beaten, but can they show who beat the baby?"

Detectives arrived at the N.W. 77th Terrace home Tuesday afternoon after receiving a call that a baby was having trouble breathing. The infant died a short time later.

Police noticed the baby’s 3-year-old brother was also injured. The toddler was taken to Jackson Memorial Hospital for treatment.

State records show the children’s mother, who has a total of four children, has a prior record with the Department of Children & Families.

"She should have never had custody of those kids," said Shamauri Love, the baby's godfather.

Records show that, in the past, Dorval had been charged with battery, marijuana possession, selling cocaine and grand theft.

Dorval was denied bond at a hearing Friday morning.

A DCF custody hearing is scheduled Friday to determine where the remaining children should be placed.