The red mohawk comment is not a direct quote, and is only indirectly attributed to AS by the inclusion of "other executives".
As far as Mr. Sharif and other executives at the company were concerned, Dellen and his red mohawk spelled trouble.
AS's objections to DM are spelled out much more clearly in the paragraph which follows:
I thought he was just a spoilt little brat who had his way all his life and didnt appreciate what his father was doing for him, said Mr. Sharif. He was an impediment to the hangar operation who didnt meet his deadlines, almost never arrived at work before noon, and refused to clear his collection of cars, jeeps, hot rods, jet skis and personal airplanes from the business premises.
Sounds to me like DM was more concerned with immediate gratification than an investment with long term potential. JMO, but I don't get the feeling DM was protecting "his father's" money:
He emphasized to Dellen, as he had to Wayne, that the real value of the business lay in its coveted Transport Canada operational certification, the high-quality team it had assembled, and the potential customers who, Mr. Sharif says, were lining up. To dismantle the business before things really got underway and plans came to fruition could mean getting back just 20 cents for every dollar invested.
Yet thats exactly what Dellen, Waynes sole heir, did when his father died suddenly. Mr. Sharif and the Millardair team were told that Wayne had died of a brain aneurysm. Within days, employees were laid off and Dellen moved quickly to begin liquidating assets.
http://news.nationalpost.com/2013/05/31/millard-aviation-business-in-decline-long-before-tim-bosma-murder-suspect-started-to-dismantle-it/