The brother of the woman killed in her South Park home is speaking to the media for the first time about what the death of his sister, Teresa Butz, has done to their family.

Tim Butz says; "Total devastation for us, total. It's total. There aren't any words to describe what we're going through. We can accept a car accident, something happening, people get sick. We're human, we're all going to go, but somebody took my sister from me."

In response to neighborhood fears, several dozen police officers have joined in on the effort to find the suspect who entered a home and stabbed two women while they were sleeping. Up to 100 Seattle officers are on the case. The effort includes increasing patrols, reassigning community service officers from other parts of town, and deploying a "mobile precinct" to aid in the search.

About the search, Butz says; "If he did this to my sister and he did this to her partner, absolutely he could do this to someone else. they have to get this guy. They have to get this guy."

About 300 people from Seattle's Southpark neighborhood attended a community meeting Monday night held by the Seattle Police and for the first time they got a look at the sketch of the suspect police developed with the help of the surviving victim.

Investigators say a slender but muscular man in his late 20s or early 30s, about 6 feet tall with a thin mustache, broke into the home. Police reveal an additional detail about the sketch. Police say the suspect is described as having 'blotchy' skin.

Also The FBI has joined the search for a suspect who police say terrorized two women as they lay sleeping.

The women were stabbed early Sunday morning at about 3 a.m. One of them is dead and the other was hospitalized. The dead woman has been identified as 37 year old Teresa Butz.

Friends say Butz was on the Board of Directors for The Compass Center in Seattle. A spokeswoman says they're in shock and extremely saddened. Butz was also an active volunteer for the Juvenile Diabetes Research Foundation. Seattle Guild Executive Director Toby Erickson says every March Butz worked the Dream Gala which raises money for research.

Butz also worked for Regus in Seattle. Spokesman Dennis Watson says, "Butz was a highly-valued team member of the Regus family serving as General Manager in the Seattle market. For more than three years Teresa has served in a variety of leadership roles for Regus. It was a privilege to have had the opportunity to work with her. Her work community sends her family and friends our sincerest condolences during this tragic loss. We will all miss Teresa as a professional colleague and a friend."

Police reveal that an the suspect broke into the women's home through an unlocked or open window. The suspect then began to stab the women as they slept. Both women were able to get out of the house, but one of them died shortly after the attack.

Sara Miranda was just down the street and heard the women screaming, she ran to help them. Miranda said she and others put towels and their own clothes on the women to stop the bleeding but one of the victim's didn't survive. "She died like two minutes before the ambulance came" Miranda went on to say "she was just bleeding too much."

"Attacks of this nature are extremely rare in this city," said Assistant Police Chief Nick Metz. "So it's very important we get this guy off the streets."

Several neighbors called 911 after hearing the disturbance. The house has been cordoned off by police and the Seattle Police Homicide Unit and Crime Scene Investigation Team are on the scene. Several law enforcement agencies are assisting with the investigation, including the FBI, the Washington State Patrol Crime Lab and the King County Sheriff's Department.

"The FBI is involved because it has a larger crime data base," said Metz. FBI investigators will compare known suspects in a national data base with the information about the attacker, to see if they can find a match.

Police say the suspect is a black male in his late 20's or early 30's. He's between 5' 8" and 6' 0", had a thin mustache, medium build and is slightly muscular.

Residents in Seattle's South Park neighborhood are in fear after hearing what happened to the two women. Some tell Q13 FOX News they are taking extra measures to stay protected.

Assistant Chief Metz says the Seattle Police Department plans to schedule a neighborhood meeting at 7 p.m. Monday at the South Park Community Center, to update the public about the progress of the investigation and to talk about what can be done to prevent similar crimes.

The victim that was sent to Harborview Medical Center was released Monday. The 36 year old is expected to recover from her injuries.

If you have any information on this case, you are urged to contact Crimestoppers or call Seattle Police at their tip line. That number is (206) 233-5000 and is 24 hours. Tips can be left on the message line and detectives will follow up.

CrimeStoppers of Puget Sound 1-800-222-TIPS

Text a Tip: Text TIP486 with your message to CRIMES (274637)