they apparently fit the vague description of the 3 ppl the officer allegedly chased on foot.

also they may have been the 3 ppl whose images were captured in that video the police considered releasing to the public in the days after the officer was found (http://www.nbcchicago.com/news/local/Three-Suspects-in-Fox-Lake-Manhunt-Ruled-Out-as-Suspects-325733241.html).

at least one woman has been arrested and charged w/making a false report to police after she claimed she knew something about 3 ppl who may have been involved w/the case (http://chicago.cbslocal.com/2015/09/02/police-intensify-search-for-suspects-in-fox-lake-cops-murder/.

and a former Chicago cop has been charged w/a felony for threatening the police and the coroner if they don't label this shooting as a suicide (http://www.chicagotribune.com/news/local/breaking/ct-fox-lake-police-shooting-threats-20150913-story.html).

other than that i haven't heard much about folks being rounded up and interrogated in this case. and i'm glad considering the police only have that very vague description of 'suspects' (2 white dudes and a black dude) - though i think they're more like 'persons of interest' considering i dunno that those ppl had anything to do w/the officer being shot.