Zephyrhills, Florida -- Officials continue to investigate the suspicious death of 18-month-old who passed away inside his home early Saturday.

Department of Children and Families Secretary Mike Carroll wants a full investigation into the death of 18-month-old Sebastian Lieb. He wants to determine if there were any actions that could have been taken to prevent this tragedy.

10News WTSP has learned the child had at least one prior interaction with the child welfare system. His guardian also had a history of run-ins with police.

“It’s very sad,” says Eduardo Miranda, a neighbor.

Neighbors question whether officials missed red flags.

“About 6 months ago, I was working on friend’s truck and I heard some commotion and she had a limp baby in hand,” says Jay Rivera, a neighbor.

Rivera says he called 911 and they coached him through CPR to bring the baby back to life.

“I said why is baby bleeding in the mouth and when I grabbed cheek he was bleeding in both ears,” says Rivera.

Rivera says when EMS arrived, the woman denied additional care.

Now that same baby is dead.

“We are going back and looking at everything,” says Sgt. Reginald Roberts, with the Zephyrhills Police Department.

Detectives on the case sat down with 10News on Monday saying that they are aware of past instances and are making sure nothing in the past was missed.

“We’re not saying there was something suspicious but we’re going back and investigating as far as everything goes,” says Roberts.

10News also has learned that police had interactions with the family three times since February. They were all domestic calls.

“When there’s a domestic situation, we are going to talk to children. The domestic issue occurred and we check welfare of children and with the two involved and we certainly go around to neighbors,” says Chief David Shears, with the Zephyrhills Police Department.

10News has learned there’s no law requiring police to notify child protective investigators in a situation like this if it didn’t involve the children. The police chief says he will be looking at all those calls to make sure warning signs were not missed.

“Absolutely that’s the ongoing investigation,” says Shears.

The toddlers legal guardian Kim Culp and her wife Angela Burghy are both behind bars after officers found meth, cocaine, and pills inside the home.

Detectives also say the toddler did have bruising on his body.

Detectives are waiting for the final autopsy to determine exactly how the baby died.

Anyone with any information on this case is asked to give them a call (813) 780-0050.