KALAMAZOO, Mich. — Investigators in Allegan County said they’re waiting for lab reports before determining if the driver of a pickup who slammed into a postal carrier truck will face charges.

The postal carrier in the vehicle was killed after police say her truck overturned in a ditch and caught fire. Since the crash, research by the National Association of Letter Carriers showed growing fire concerns over the Long Life Vehicles. Many have been in service for more than 25 years, according to union memos and letters.

Memos and instruction materials sent by the United States Postal Service to field offices dating back to 2014 show the agency has been aware of fire safety concerns with older vehicles for many years. The concerns revolves around reports of them catching fire despite not being in crashes. More at WWMT