As crews continue to assess the aftermath of Sunday’s deadly shooting at a Church of Jesus Christ of Latter-day Saints meeting place in Grand Blanc, Michigan, officials from across the state mourned the victims of the attack that killed four people.

Flint health and drug rehabilitation officials say they are treating a growing number of patients using what they call a “gas station opioid” -- a highly concentrated byproduct of kratom that’s being sold at convenience stores and smoke shops throughout Genesee County.