The main suspect in the grisly Washington DC quadruple murder, Daron Wint, had blood matching one of the victims on his shoe when he was arrested, police announced on 3 June.
According to two law enforcement officials, forensic analysiss matched traces of blood on Wint's shoe to at least one of the murder victims, CNN reported. Police did not specify which of the victim's blood it was.
Lawyer Robin Ficker, who has represented Wint in the past, told CNN that he believes authorities have "the wrong guy" and that Wint is "a kind, gentle, non-aggressive person". Ficker also questioned the new evidence revealed by authorities on 2 June.
"I have a lot of questions about that," he said. "Why is this coming out now?"
Wint, who was arrested after his DNA was found on a pizza crust at the scene of the crime, is charged with first-degree murder of 46-year-old construction business owner Savvas Savopoulos, his 47-year-old wife Amy, their 10-year-old son Philip and their 57-year-old housekeeper Veralicia Figueroa.
The four victims were discovered in the Savopoulos $4.5m (£2.9m) mansion on 14 May, when the home was set on fire. The three adult victims died after being struck and stabbed, while the couple's son died of "thermal and sharp force injuries," the criminal complaint stated.
Wint allegedly held the four captive on 13 May until he received $40,000 (£26,000) in cash, after which he killed them and set fire to their mansion. According to the Daily Mail, Savopoulos's assistant delivered the $40,000 to the house before the four were killed. The money, along with the couple's Porsche, disappeared. The vehicle was later found burned in a Maryland parking lot.
The Savopoulos were laid to rest by two surviving teenage daughters, who were away at an elite boarding school at the time of the murder. Nineteen-year-old Abigail Savopoulos and 17-year-old Katerina Savopoulos led the funerals of their parents and brother at St Sophia Greek Orthodox Cathedral in Washington on 1 June.
Meanwhile, Figueroa is expected to be returned to her native El Salvador.
Police do not believe that Wint acted alone in the murder. According to CNN, police are still investigating the murder and subsequent fire and have not revealed what happened in the days leading up to the quadruple killing.
A preliminary hearing is expected on 23 June.