In the video one suspect walks back and forth in front of the home a couple of times, clearly casing the place. Police say this indicates this attack was not random.
When the suspects see a couple walking into the home, they see their opportunity. They hold the man and woman at gunpoint and barge inside with them. Police believe the two men are the ones responsible for the murder.
"The video is very clear that we see two suspects going into this home and we see two suspects leaving. There is no indication that there was anybody else there," said San Francisco Police Department spokesperson Lt. Lyn Tomioka.
A short time later, one of the suspects walks back outside and forces a man out on the street inside -- also at gunpoint. Police say the suspects figured out the man was calling 911 on his cell phone, so they pulled him in and tied him up along with the other victims. The move provides police with one more shot of his face.
"They do appear to be Hispanic. We don't have heights and weights from a specific source, but I think one suspect is about 5'6," 5'7," said Tomioka.
The men were inside for about 40 minutes. They shot and killed 44-year-old Xiao "Ben" Xiong Luo and tied up seven other people. The video came from the two surveillance cameras mounted on the front of the home. Police will not officially say what was going on inside the house, but sources say they are looking into whether this was the site of a brothel.
"We're not prepared to call it a brothel yet. This is an ongoing investigation," said police Chief George Gascon.
Police do not know what was stolen, but the suspects clearly left with stuff on their backs. It is all very alarming to people living around 30th Avenue and Moraga.
"This is unbelievable. I don't remember the last time I heard about a violent crime, you know a homicide in this neighborhood; it's kind of scary," said residents Gene Stuart.
Police say one of the suspects shot Luo in the back as he was running upstairs. This all happened inside his home Wednesday night. The other victims were not hurt.
Investigators are hoping someone will recognize the men in this surveillance video and will call them right away.