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

Search warrants filed in the murders of a northwest D.C. family and their housekeeper say cell phones belonging to the victims were stolen from the home where the crimes took place and it is believed there was forced entry into the home on the day of the killings.

According to three search warrant affidavits, cell phones belonging to Savvas Savopoulos, his wife Amy, and their housekeeper were stolen from the home after the murders. Investigators hoped data from those phones would lead them to the suspects in the case.

A fourth unsealed warrant is for the phone records of Savopoulos' assistant, Jordan Wallace, who delivered $40,000 to the family's home on the day the victims were found dead.

A fifth search warrant of two vehicles that were involved during the arrest of Daron Wint, a suspect charged in the murders of this case, revealed another new detail in the murder investigation.

The warrant says a shoe or boot print was found by investigators on an exterior French-style door of the Savopoulos' home and it suggests there was forced entry into the house. The door had a single broken window pane and was broken near the lock. Investigators are now searching for any shoe or boot with a similar tread pattern.

This search warrant also says investigators searched a car that Wint was riding in for a digital video recorder that may have been used to capture and store surveillance video at the Savopoulos' house.

Savvas Savopoulos, his wife Amy, their 10-year-old son Philip and Veralicia Figueroa were found dead by firefighters on May 14 while battling a fire at their Woodland Drive home in the Woodley Park neighborhood of Washington D.C. Their deaths were ruled to be homicide.

Wint was arrested in this case after police found DNA linking him to a partially eaten pizza crust that was delivered to the Savopoulos' house on May 13. There have been no other arrests in this case, but the search warrant affidavit says "the crimes described in this affidavit required the presence and assistance of more than one person."

On Tuesday, D.C. police investigators were back at the Savopoulos' home examining a large safe located in the garage of the house. Investigators were also seen combing through documents and other items in a second-floor bedroom of the home.

Stay with FOX 5 and myfoxdc.com for updates.

More coverage of the Savopoulos murder investigation:

DC police examine large safe in garage of Savopoulos' home

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EXCLUSIVE: Police tow 3 vehicles from home of DC quadruple murder

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

Former Wint attorney: "They should start looking for the guy that really did it"

Report: Wint took cab from NYC to Maryland

Affidavit: Daron Wint and "others" involved in northwest DC murders

CAPTURED: Quadruple murder suspect Daron Wint arrested in Northeast DC

Who is Daron Dylon Wint? What we know about the quadruple murder suspect

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