In Chapter 5, Mackintosh returns to The Nest after visiting the five places which had an Azran egg. At some point, he refused to hand over his research to Bronev and fled. His escape was almost futile when he was shot by two Targent soldiers; luckily, he was rescued by Professor Layton and his group. Before passing out, Mackintosh revealed to them that he and several other researchers were forced to work with Targent to aid Bronev's goal.
An archaeologist who'd travel to the moon if he thought he might find an Azran ruin there, so when Targent offered him the "position of a lifetime", he jumped at the chance - it turns out they meant it literally. He loves radishes almost as much as the Azran, and always carries a few in his pockets.