Update: Scott Stewart was removed from the board.
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Scott Stewart, who was the director of the Kilties (DCA) & currently serving on Pioneer's interim board of directors, allowed Morgan Larson (former member of the Madison Scouts in the mid 80s, infamous director of the CapitolAires and a lifetime registered sex offender) to march in the corps in 2011-2013.
https://www.highbeam.com/doc/1G1-73191042.html
https://www.wicourts.gov/ca/opinion/DisplayDocument.html?content=html&seqNo=11254
https://www.offenderradar.com/details/wi/10906/morgan-c-larson
https://www.flickr.com/photos/avatar1/6136979602/in/album-909548
https://www.drumcorpsplanet.com/forums/index.php?/topic/145606-give-a-big-shout-out/
https://www.drumcorpsplanet.com/forums/index.php?/topic/146995-my-slightly-late-drums-on-parade-review/
Larson's arrest and conviction would have clearly been known to Stewart, considering Madison Jr. Scouts absorbed CapitolAires to form Capital Sound.
https://groups.google.com/forum/#!topic/rec.arts.marching.drumcorps/I9UbKVE_pMI
Concerns about Larson's participation with the Kilties were raised at the time by members of the drum corps community. Those concerns were summarily refuted and/or ignored.
The Kilties performed at several high schools in Wisconsin during those years, and also at several DCI-sanctioned events in which children were present. There were also minors in the corps.
https://www.youtube.com/watch?v=y6Yh5FIa0mo
https://www.youtube.com/watch?v=ggfqLqN0nf4
Here is a link to more information on Morgan Larson, including his involvement with a Soundsport group sponsored by the Cavaliers in 2018 (that's right, 2018....THIS summer).
https://www.reddit.com/r/drumcorps/comments/99j37v/come_on_roman/e4o5ihk
Pioneer was suspended for employing a registered sex offender, among many other things. Now I don't know about you, but if I'm rebuilding a corps' board of directors who was previously a rubber stamp for the wishes of a man who knowingly and willingly employed a registered sex offender, I'm not going to reach out to someone who knowingly and willingly allowed a registered sex offender to participate in his all-age corps, and then ask him to serve on the new board, even in an interim capacity. At best, the optics are horrible. At worst, it's grounds for immediate and permanent disqualification (especially on the heels of the reveal that Roman Blenski is still involved with Pioneer).
Everything linked above is public record.