Further investigation has revealed two other people were in the apartment when the eight-year-old was shot.
The suspect was booked into King County Jail for investigation of homicide and is being held without bail.
Washington state moves into a fourth wave with more than 1,500 new cases reported on Saturday.
Seattle had the most off-duty officers attend the January 6 rally and insurrection in the nation.
The Amazon owned platform refused to comment on the status of the employee.
The shooting is the eighth homicide in Seattle since January.
The Governor expressed disappointment and concern that no criminal investigation had been opened into Troyer's actions.
Less than one in one million people have experienced blood clots, with one reported fatality.
The three counties exceeded new case numbers and hospitalizations over the previous two weeks.
Washington state accelerates vaccination for all as cases increase at an alarming rate.