Man allegedly used Grindr to hunt and shoot gay people.

Demetris Nelson, 26, allegedly used the gay hook-up app to find unsuspecting robbery victims. (Image: PinkNews)

A Detroit man is facing a first-degree murder charge after allegedly using Grindr to track down gay people and shoot them.

Police say that Demetris Nelson, 26, used the gay hook-up app to find unsuspecting robbery victims.

According to officers, Nelson…