Investigators say video, cell records and a witness statement led to the arrest in Wenatchee.
LACEY, Wash. — A 20-year-old Lacey man was arrested this week in the drive-by shooting that killed brothers Alexander and Deven Borgen on Nov. 14 near College Street Southeast and 24th Avenue, police said. He was booked into the Thurston County Jail and is being held without bail.
The case has gripped Lacey since the teens were found in a crosswalk early Friday, Nov. 14. Police say the arrest followed several days of work that included reviewing neighborhood surveillance, analyzing phone data and interviewing witnesses. Prosecutors are reviewing the investigation while the suspect awaits an arraignment set for Nov. 25. The killings have prompted questions about motive, prior incidents in the area and how investigators traced the car involved in the shooting across the state before taking the suspect into custody.
Officers responded about 1:50 a.m. Nov. 14 to reports of shots fired just south of Mountain View Elementary. They found the brothers, ages 16 and 17, fatally wounded in the roadway near College Street SE and 24th Ave SE. Investigators said the shooting came from a passing vehicle and the pair appeared to have been ambushed while walking. Over the weekend, detectives canvassed the corridor and pulled footage that showed a car racing from the scene. “We’ve had an incredible amount of help from the community,” Lacey Police Sgt. Detective Knight said in court Wednesday, noting the dozens of tips and videos that arrived after the department asked nearby residents to check cameras between 1 and 2 a.m.
According to investigators, the suspect is Trequanne Trenelle Wilson-Mason of Lacey. Detectives said they linked him to the car seen on video and later placed his phone near the intersection at the time of the shooting. A witness told police the man admitted to firing the shots, according to probable-cause documents. Records show he was detained Tuesday at a hotel in Wenatchee with help from local officers and transported back to Thurston County. Jail logs list preliminary allegations of two counts of first-degree murder and two counts of drive-by shooting. Formal charging decisions remain pending. Authorities said the gun used in the killing has not been publicly identified, and they did not release how many rounds were fired.
Court filings describe a possible mistaken-identity motive. Investigators said the suspect told police he believed one of the brothers was connected to an earlier shooting at his home in October 2024. He later “became emotional after realizing he shot the wrong people,” the filing states. Family members described the brothers as students with strong grades and active in church. “My son Deven had all A’s in school; he went to church,” their mother, Christina Borgen, said in court. A grandfather, Kenneth Borgen, called the teens “good kids” and questioned why the suspect had been free before the attack. Police have not confirmed whether the October 2024 incident is tied to any open case, and investigators have not said whether anyone else is sought in the Lacey shooting.
Wilson-Mason has prior cases in Thurston County, including a domestic violence matter filed in February. He is being held on a no-bail warrant tied to that case in addition to the homicide allegations, according to jail records. Detectives said the arrest was the result of coordination across several agencies, including Lacey police, Wenatchee officers and county prosecutors. In the neighborhood near Mountain View Elementary, a memorial of flowers and candles marks the spot where the brothers were found. Residents who live along College Street said speeding is common late at night and that they heard several rapid shots before sirens arrived.
Prosecutors said they will decide final charges before the arraignment set for Tue., Nov. 25. If filed as alleged, the case would proceed to Superior Court, where a judge could set future hearing dates and address discovery. Police said they are still collecting footage from homes and businesses south of 24th Ave SE and encourage anyone with video from 1–2 a.m. Nov. 14 to share it with detectives. Investigators also plan to analyze forensic evidence from the recovered vehicle. Authorities did not release a timeline for lab results.
On Wednesday evening, mourners gathered at the corner of College Street SE and 24th Avenue, setting up candles, jerseys and photos of the brothers. A youth pastor led a short prayer as classmates shared brief stories. “They were always together,” one student said, adding that the boys had planned to meet friends after school the day before they were killed. A woman who lives nearby said she woke to “five or six pops” and then silence. Parents who walked past the memorial after dismissal at Mountain View Elementary paused to read hand-written notes taped to a light pole.
As of Thursday morning, the suspect remained in the Thurston County Jail without bail while prosecutors review the case ahead of the Nov. 25 arraignment. Detectives said they are still seeking additional video from the College Street corridor and will release more details as the investigation allows.
Author note: Last updated November 20, 2025.