The House ethics committee said Monday that reviewing the financial records connected to an ethics complaint against Aurora Democrat Rep. Mandy Lindsay is proving more complex than usual. The committee is examining a complaint from Rep. Bob Marshall, D‑Highlands Ranch, alleging that Lindsay mishandled and improperly used funds for her own personal benefit in a way he argues was unethical and potentially criminal. The issue that drew the committee’s attention during its May 4 meeting was a caucus retreat check. The complaint says that between Nov. 18 and 21, 2024, six debit‑card charges totaling $6,358.68 were made at the Golden Courtyard Marriott using the House Democrats’ caucus fund. Those payments were for a retreat. On Dec. 4, 2024, a self-written check to Lindsay for the same amount was deposited in her personal bank account. The subject line said “retreat reimbursement,” according to the complaint.…