Prosecutors and defense attorneys will finally present their theories in Mansion Murders case

In D.C. Superior Court on Tuesday, a jury of nine men and seven woman will finally hear the evidence against the man accused of killing three members of a wealthy D.C. family and their housekeeper more than three years ago.

Savvas Savopoulos, his wife Amy, their son Philip and the family's housekeeper, Vera Figueroa, were found beaten, strangled and stabbed to death inside the family's Northwest D.C. mansion in May 2015.

Starting at 10 a.m. Tuesday, a veil may be lifted on many of the baffling questions in this troubling case.

JOIN THE CONVERSATION: The Mansion Murders: A FOX 5 DC true crime podcast

Prosecutors will lay out their case in an opening statement telling jurors their theory on how the suspect, Daron Wint, got to the Savopoulos' house and what happened over the next 14 hours before the house was set on fire.

The defense will then have its turn at convincing the jury that Wint is not guilty. They have already informed the court it has evidence someone else was involved.

Prosecutors do not have to provide a motive - all they have to do is prove Wint was behind one of the more vicious killings in the history of D.C. crime. But will they go there? It is the one question many people who have been fascinated with this case would like to know. If Wint is found guilty - why did he go to the Savopoulos' mansion on Woodland Drive that night? Was it for revenge?

Wint at one time worked at American Iron Works in Maryland, the company Savvas Savopoulos owned along with his father.

From the beginning, investigators have said they thought others were involved, but Wint has been the only person arrested in this case.

Will the jury hear from Jordan Wallace? He is a Savopoulos personal assistant who delivered the ransom to Savopoulos' house the day of the murders. He has never spoken publicly, but initially lied to the police.

Prosecutors do not have to tell the defense who they are calling. Will Wallace be a surprise witness? Defense attorney David Benowitz, of Price Benowitz, LLP, who is not involved in the case, said Wint's defense team must present their theory and then stick to it.

"If you have a theme, whether it's someone else did this, whether it's the DNA evidence is not accurate - whatever your theme is, you have to keep coming back to it," said Benowitz. "Because I think during an eight-week trial, it's just difficult for jurors who have never heard the evidence before and they are only going to get one shot to hear it in a lot of situations. It's important to keep them focused on what your point is."

Prosecutors have already revealed Wint's DNA was found on a pizza crust inside the Savapoulos' house as well as on other items, including a neon green vest discovered inside the family's Porsche that was stolen from the home and set on fire in Maryland.

The Mansion Murders - More coverage from FOX 5 DC:

Jury selection begins in Savopoulos DC mansion murders case

Defense to proceed with theory of another suspect in DC Mansion Murders case

Prosecutors: Suspect's DNA a 'possible contributor' on knife recovered inside Savopoulos home

Additional DNA evidence links Daron Wint to DC mansion murders

Prosecutors list evidence turned over to defense in DC mansion murders case

Suspect charged in DC mansion murders pleads not guilty

6 months later: A deeper look into the DC mansion murders investigation

Detective: DNA from vest, money links Daron Wint to DC quadruple murder

Search warrant: Baseball bat with blood on it found inside home of DC mansion murders

New attorney approved for man charged in DC mansion slayings

Items moved from Savopoulos house; suspect set for July court appearance

Search warrants: Shoe print, broken door show signs of forced entry into Savopoulos' home

FIRST ON FOX: Savopoulos assistant Jordan Wallace lied to police about details of $40,000 cash

Court documents: Police searched vehicle of Savopoulos assistant Jordan Wallace

Funeral services held for DC arson murder victims

Report: Wint took cab from NYC to Maryland

CAPTURED: Quadruple murder suspect Daron Wint arrested in Northeast DC

DC police examine large safe in garage of Savopoulos' home

Prosecution: Possible more than 1 person involved in Savopoulos murders

Details about Savopoulos's assistant who delivered $40,000 cash to family's home