Home invasion robbery by men posing as police

SeattleCrime.com has details of a home invasion robbery at an apartment near 13th and Beacon in the early morning of November 1st. A couple was robbed of several thousand dollars by six men dressed as police officers.

From the story, the couple seems to think they were targeted after having gone to a taco stand earlier in the evening. I wonder what could have happened at a taco stand to make these criminals interested in tracking down and robbing these victims.

Update: KOMO has more details.