The father who killed his family in their Disney home had first suffocated his wife and two children but stabbed his teenage son with a kitchen knife when he fought back, before then slicing his wife and other son to make sure they were dead, a source familiar with the investigation exclusively told DailyMail.com.

Anthony Todt, 44, was arrested on January 13 and charged with four counts of murder for the killings at his home in Celebration, Florida, a gated community designed and developed by Disney.

Police entered the home and found the rotting bodies of his wife Megan and their children Alek, 13, Tyler, 11, and four-year-old Zoe wrapped up in blankets after concerned relatives told police they hadn't heard from the family for awhile.

Everyone but Zoe had stab wounds and while the local medical examiner hasn't officially determined the cause of death, a source told DailyMail.com that Todt first suffocated his family members one by one.

But when Todt got to Alek last, the teenager fought back by scratching and biting him, leading Todt to stab him with a kitchen knife. Todt then went back and stabbed his wife and second son to make sure they were dead.

DailyMail.com can also reveal that the local sheriff's department were called to the Orlando-area home at least five times during the two-week period that no one had seen the family, but no one entered the home until January 13.

Anthony Todt, 44, was arrested on January 13 and charged with four counts of murder for killing his wife Megan and children Alek, Tyler and Zoe (all pictured) at their home in Celebration, Florida, a gated community designed and developed by Disney

A source told DailyMail.com that Todt first suffocated his family members one by one. But when Todt got to Alek (right) last, the 13-year-old fought back by scratching and biting him, leading Todt to stab him with a kitchen knife. Todt then went back and stabbed his wife and second son to make sure they were dead. Zoe wasn't stabbed

DailyMail.com can also reveal that the local sheriff's department were called to the Orlando-area home at least five times during the two-week period that no one had seen the family, but no one entered the home until January 13

Documents show that Todt's sisters were calling the Osceola County Sheriff's Office from Connecticut, where the Todts lived part-time, sometimes daily to ask deputies to check on the family because they suspected something wrong.

The Todts' landlords in Florida were asking questions, too, as well as FBI agents who were asking the sheriff for help locating Tony, who was under investigation for Medicaid fraud.

Todt was arrested and admitted to killing his family.

A source at the sheriff's office said authorities believe they were killed shortly after New Year's Day.

After refusing to release detailed information about the murders for more than a week, the office of Sheriff Russ Gibson made available a slew of reports about the brutal murders and audio tape of 911 calls made by worried family members, acquaintances and FBI agents.

The reports show deputies drove to the house in Celebration, a quiet community developed by the Walt Disney Company in the mid-1990s, at least five times between December 31 and January 13 but didn't notice the smell of decomposition.

According to the reports, a neighbor even offered a deputy a key to the Todts' home on January 11. The neighbor said she held a key because the couple often asked her to walk their dog. The deputy declined to use it.

Sheriff Gibson, who's running for reelection, didn't respond to an email asking for comment.

Documents show that Todt's sisters were calling the Osceola County Sheriff's Office from Connecticut, where the Todts lived part-time, sometimes daily to ask deputies to check on the family because they suspected something wrong

But Mike Fisher, Gibson's opponent and a former 30-year employee of the Osceola County Sheriff's Office, said the case was mishandled by the agency.

'This case has been plagued by a calamity of errors,' Fisher said. 'There's a culture of laziness in that agency. No sense of urgency. It's unclear when the victims died, so they possibly could've been saved.

'There were enough reasons for the deputies to enter the home way before they did. The victims had been reported missing by their families up north. That in itself was enough.'

Reports show a sheriff's deputy first knocked on the door on December 31 to serve an eviction notice. He reported no answer and left his card in the door.

On January 9 and January 10, another deputy alerted by Tony's sister in Connecticut knocked on the front and back doors, then headed to an apartment the couple owned less than a mile away and knocked there too.

He canvassed the neighborhood, noting the family's only car was parked in the backyard and found the neighbor with the key.

Another deputy returned the next day, arriving at the house at 12:39pm and leaving at 12:52pm after the Todts' landlord asked for a 'wellness check,' according to the reports.

And again, yet another deputy returned January 12, but he took no action.

Finally, on the morning of January 13, federal agents on surveillance spotted Todt entering the house shortly after 9am.

In a 911 call, Todt's sister revealed Megan made a remark that 'the world was ending on the 28th'. No one had heard from the family in weeks, as Todt claimed everyone was sick with the flu

The agents and several deputies knocked on the door. No one inside responded.

One deputy grabbed the door handle and saw the door was not locked. Agents and deputies entered and called for Tony to come to the door.

There was 'a foul odor emitting from inside the residence,' one deputy noted on his report.

Tony was first spotted walking down the staircase from the second floor with difficulties, holding on the railing. He needed to be assisted after telling authorities he tried to kill himself with a high dose of Benadryl. His body, the report notes, was shaking uncontrollably.

At first, he told deputies asking about his wife that she was asleep upstairs.

'I went upstairs and observed a bedroom door to the right that was open,' one deputy wrote. 'I could see inside the bedroom that one person was laying on the bed covered with blankets. I pushed the door open further and observed two persons laying on mattresses on the floor covered up.'

On the bed, the deputy uncovered the body and found Megan, 'deceased for a fair amount of time.'

Tyler and Alek were on the mattress on the floor.

It took a while longer for the deputy to find little Zoe but found her wrapped in a blanket at the foot of her mother's bed.