Here is another from CBS with slightly more detail
May 25 Police released four people http://www.cbsnews.com/news/4-detained-with-d-c-mansion-murders-suspect-released/
WASHINGTON -- D.C. police say they have released
four people who were detained at the same time that the suspect in the slayings of a wealthy family was taken into custody.
Police did not identify the four people or say how long they were detained. There was no immediate word on the whereabouts of a
fifth person taken into custody when Wint was.
The reporter, Juniana Goldman, states in the video that
five were arrested but they've since been released. This conflicts with the written account on this web link. ( Aaarrgh!)
Doesn't take much to guess who this one was.