Police say Jamie, 29, was badly injured, along with her husband Nation Hahn, 27, when police said Jon Broyhill - who was formerly a close friend to the well-known political couple - allegedly stabbed them at their North Raleigh home before turning the knife on himself. Jamie died of her wounds early Wednesday at WakeMed.
Police haven't officially said money is a motive, but Broyhill worked as an accountant for Jamie's political consulting firm, Sky Blue Strategies, where former Rep. Miller was a client.
Miller told ABC11 Wednesday he's just learned of an inquiry into his campaign's finances.
"It's very upsetting and I think everybody involved knows Jon and knew Jamie and knows Nation," said Miller. "Jamie was part of our campaign. She was one of those who was asking more and more aggressive questions more and more insistent questions of Jon."
Miller said last fall the Federal Elections Commission sent his 2010 campaign a letter about five donors whose refunds never came.
"The FEC did send a letter that I just found out about today and the letter was to John Wallace, the campaign treasurer, and he just found out about it today he told me," said Miller.
Miller said Broyhill would have received that letter, but never showed it to him or his treasurer possibly because of money irregularities.
Miller said it wasn't until recently, possibly before the stabbings and murder, that Jamie Hahn confronted Broyhill about the problems. All police have said is that the motive was not domestic in nature.
"It doesn't appear that there was an immediate argument or confrontation but this may have been in the background," said Miller. "It certainly may be that Jon was aware that he was about to be caught."
Broyhill is now facing a murder charge
Miller said Broyhill may have worked for other high profile campaigns. So this possible motive could be much more involved.
A funeral service for Jamie Hahn is scheduled for Saturday at Pullen Memorial Baptist Church.