I'd vote for him, and I hope he gets Home Affairs.
We constantly decry non-expert politicians being out of control of spendaholic senior civil servants. I think it would be eminently sensible for someone with deep inside knowledge of the courts, the prison and the whole criminal justice system to be put in charge of Home Affairs. He couldn't do much worse than the current incumbent, a former humanities teacher.
As regards "control" of the police, I think the phraseology is disappointing. Nevertheless, is it not true that we still lack independent oversight of the States of Jersey Police, along the lines of the Metropolitan Police Authority
http://www.mpa.gov.uk/default.htm ? What this means is that you - as a lay person - could get elected to the police authority, to scrutinise the police. Who polices the police? These people do.
Yes, I know the Met polices 8 million people and SOJP polices 90,000, but that is beside the point. It is about who polices the police. We allow the police to police us by consent, and part of the deal is to ensure adequate scrutiny. If Mr Le Marquand wants to deliver that, good for him.