Drowing -- Write With (AP) Style

On second reference, is it Dr. Lowrie and Officer Linn? Or Lowrie and Linn?

AP Style, under "doctors":

Use Dr. in first reference as a formal title . . . do not continue to use of Dr. in subsequent references.

AP Style, under "military titles":

On first reference, use the appropriate title before the full name . . . in subsequent references, do not continue using the title before a name. Use only the last name.

On second reference of young Edward McGorwan, is it McGorwan or Edward or Edward McGorwan? Here's AP Style, under "names":

In general, use last names only on second reference.

When it is necessary to distinguish between two people who use the same last name, as in married couples or brothers and sisters, use the first and last name.

In stories involving youngsters, generally refer to them by first name on second reference if they are 15 or younger and by their surname at 18 and older.

However, use news judgment and refer to children under 15 by their last name if the story is a serious one involving, for example, a major crime. With the 16- or 17-year-olds, use the surname unless it's a light-hearted story.

So, given the circumstances in this case, what is the way to go?

And is it navy, or Navy?

Look it up and tell me.