The Amsel family is known to have strong ties to the Rainwood family and The Order. In the 1800s, a man named Augustus Amsel was the Grand Minister of an organization known as the Novus Ordo Europa (New Order of Europe), which eventually disbanded in 1958. The Amsel family is recorded in the organization's registry up until the 1930s, at which point all records of them seemingly stop. It was around this time that an ancient Egyptian tablet was stolen from a British museum and The Order was first founded by a man who would come to be known as the First Overseer. Since then, members of the Amsel family have been part of the organization.
Detective Amsel is presumably a current member of The Order's New Jersey Chapter.