Really there are multiple questions.
First - all money inbound and source. Note, you need to have all legal entities identified and all sources of income traced to each entity. (For example, if the donor store funds went to a different company than the Kickstarter...)
Second - where did that money specifically go and was it intermingled. For example, if Alec is leaving out his contributions, where did it actually go? You need to know where it went account by account. All funds.
Third - because money is interchangeable when received - where was it spent, item by item, so that it reconciles to the actual bank account balance for every entity for every month.
Fourth - were those expenditures valid, e.g. i would think it would be okay to buy the crew donuts, but not fly away to England for a convention. The first three items listed above are facts, this is a judgment call. For example, AAA membership doesn't seem to be not valid under any circumstances. Payments to Alec/Diana etc - well, doesn't sound valid to me but perhaps its okay to pay Diana for the donor fulfillment (instead of a vendor). Payments to a contractor who built the lighting grid - that's how you get a grid. Each item has to be reviewed.
Fifth - Specific comparison of how much Alec has put in, versus how much was spent on "invalid" items, MONTH BY MONTH. I'd probably segregate that on what he spent on himself (e.g. the salary), and how much went for other questionable items (e.g. TSA fees). I'd like to know if he was "ahead" for a while and later made up the payments to him, for example.
Sixth - Tax filings, 1099s, and that sort of thing... every payment to a person needs a 1099 or equivalent. Since some of that was presumably to Alec, he should also get a 1099.
Seventh - actual tax books for Axanar productions and all related items. Like did they pay sales tax, did they pay withholding on employees if any, that sort of thing.
THEN you could do a comparison as to whether he simply put in what was taken out for him, and do a fair analysis.