Fall City shooting victims revealed as software engineer, his wife and children ‘killed by son, 15,’ at $2m home

A teenage boy is alleged to have murdered his software engineer father, mother and three of his four siblings in their $2 million Washington home, DailyMail.com can reveal.

Mark Humiston, 42, his wife Sarah and three of their children were found shot to death Monday in their rustic Fall City mansion on Lake Alice, about 30 miles (48 kilometers) east of Seattle, home to some of America’s most expensive homes.

A 15-year-old boy was taken into custody after allegedly killing five of the seven members of the family.

Police have not released the names or ages of the victims, or their relationships to each other.

But neighbors said the teenager killed his parents and siblings, except for one sister who managed to escape the massacre.

The family purchased the sprawling three-bedroom, four-bathroom mansion in 2019. They are pictured in 2011

The teenage girl was reportedly shot twice and taken to the hospital after receiving medical attention from a neighbor. Officials say she is in “satisfactory” condition.

Humiston, originally from Texas, worked as an Associate Principal at Hargis Engineers in Seattle, where he had worked for nearly 20 years, according to his LinkedIn.

The family purchased the sprawling three-bedroom, four-bathroom mansion in 2019.

King County Sheriff’s Office spokesperson Mile Mellis said the situation was “clearly a domestic violence incident” involving a “young man and firearms.”

Mellis added that there was “no significant confrontation with the young man who was taken into custody.”

Humiston, originally from Texas, worked as an Associate Principal at Haris Engineers in Seattle, where he had worked for nearly two decades, according to his LinkedIn account.

A teenage boy has been arrested in connection with the five murders. Humiston is pictured in 2011

“What happened, happened, happened.”

Officials said the teenage suspect will be charged with first- or second-degree murder.

He is expected to appear in court on Tuesday at 1:30 p.m.

Neighbors told Fox13 that the children were homeschooled and well-known in the neighborhood, and often played and went swimming at their lake home.

Detectives arrived at the “tragic scene” around 5 a.m. after receiving multiple 911 calls reporting a shooting in the Lake Alice neighborhood.

Two adults and three young teenagers were found shot to death Monday morning in their Fall City home on Lake Alice, about 30 miles (48 kilometers) east of Seattle.

Detectives arrived at the ‘tragic scene’ around 5 a.m. after receiving multiple 911 calls

According to KOMO News, the first call was about a suicide attempt and possible gunfire in a home.

The young girl who survived the shooting reportedly called 911 from a bathroom.

“It’s very early stages of this research, but it will impact a lot of people,” Mellis added.

“I can say it’s really going to be a tragic event for the community, for anyone who has any connection here.”

Fall City ranks 29th out of 273 U.S. cities in cost of living, which is 120 percent higher than the national average – with an average home price of $1.5 million.

The area is located 25 miles east of Seattle and is part of the breathtaking Snoqualmie Ridge Mountains.

Fall City ranks 29th out of 273 U.S. cities in cost of living, which is 120 percent of the national average. Downtown Fall City is pictured

Fall City has a quaint riverside downtown filled with shops and dining options.

Mellis said Fall City, with a population of about 2,000, is a “fairly nice area, with a generally low crime rate.”

“This is a place where people come to raise their families,” he added.

The Snoqualmie Valley School District has sent an email to families warning that there may be “multiple school-age victims,” ​​according to King5 news reporter Jake Wittenberg.

However, the district said the family involved “did not attend our schools.”