This isn't really a 419. It sounds to me like the guy honestly wants Gabriel's help -- not as a sucker, but genuinely as a partner. He believes that Gabriel has skills that the bad guy can use to steal other people's money.
Of course, he might very well turn around and cut Gabriel out of his cut of the loot, but it looks at this stage like he wants a partner in crime.
Of course, he might very well turn around and cut Gabriel out of his cut of the loot, but it looks at this stage like he wants a partner in crime.