I believe the "deceit" was that Councilman Stempniak ran for re-election knowing full well she needed the Towns tax funded pension credits to increase her school teachers pensions. She knew full well in advance that she would have to also have the blessings of every Town Board Member and their party Chairman to pull this off.
Its like how she double dipped for years on health care stipends - she received a cash(tax funded) payment from one tax funded position - while taking tax funded paid health care from her other job. In the end that was around $6000.00 a year in her pocket.
She obviously planned and investigated her actions. She never informed voters or anyone publicly - until her actions were exposed by people on this site and questioned at a Town Board Meeting - after the fact. There was also a article complete with her picture in the Buffalo News.
No - its not illegal - just another Politician saying their serving their community - while milking tax payers from as many angles as possible.
Like the Judge said about Supervisor Giza, "Its not illegal - just bad governance."