Lead Investigator Feat 18
Source Pathfinder Advanced Player's Guide
Prerequisites Clue Them All In
You spend 1 minute briefing up to four allies about one lead you're pursuing.
Those allies gain the same circumstance bonus you do from Pursue a Lead to checks to investigate that lead. This bonus lasts until you cease pursing that lead or for 1 day, whichever comes first. This doesn't confer any other benefits of pursuing a lead, such as adding the circumstance bonus to your saves with Detective's Readiness.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
ExplorationAn activity with this trait takes more than a turn to use, and can usually be used only during exploration mode.
InvestigatorThis indicates abilities from the investigator class.