A San Francisco man has been arrested on Sunday in connection with the murder of five people, found dead in a home on Friday, as police  continue to analyze the crime scene and determine why these murders took place.

Binh Thai Luc, 35, was taken into custody by police and is reportedly being charged with five counts of murder, according to the Associated Press.  This arrest is just another twist in brutal murders that that police believed could have been a murder-suicide.

This was a complex crime scene. We had five deceased persons apparently from blunt force trauma. We didn't know what we had, Police Chief Greg Suhr said Sunday, adding that 40 investigators were working on the case, reported the AP.

When police discovered the brutal crime scene on Friday, they were unable to determine if a suspect had fled the scene, believing that at least two victims were shot. However, the chief reportedly said that investigators concluded that an edged weapon was also used the murders of three women and two men. All the victims were described as Asian-American adults.

Authorities are still working to identify the victims and their connection with the suspect, although Chief Suhr said that Luc knew them. He did not say how investigators were able to down Luc or what led them to believe he was suspect.

Investigators said they did not believe the killings were gang related, reported the AP.

He also said that the Luc did have a prior criminal record, but would not divulge what crime allegedly occurred.  The two brothers reportedly lived together.

Also arrested, was Luc's younger brother, Brian. He was arrested for unrelated drug and ammunition possession charges and violation probation.

The bodies of the five unidentified victims were found on Friday by a woman who reportedly had access to the Ingleside District home, a middle-class neighborhood in the southern part of the city.

The woman who found the bodies found one man dead in the foyer near the front door and the bodies another man and woman in the garage. Investigators found two other deceased women when they arrived. They believe the victims were related.