ProPublica is well aware of the benefits — and impact — of crowdsourcing. It landed a story about US President Donald Trump having sold condominiums to his own son at big discounts, avoiding the usual taxes, because a reader tipped them off after digging into Trump disclosure documents that ProPublica shared. GIJN’s program coordinator Eunice Au spoke with ProPublica’s deputy editor of engagement, Terry Parris Jr., about the nonprofit newsroom’s strategy in encouraging reader and community participation in its stories. Another view from MediaShift.