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A truck carrying 21 research macaques rolled on a Mississippi interstate and 8 of the animals ended up loose in the grass, but only 1 of those 8 ever came back alive and he went to a sanctuary instead

By SEP 15, 2026 11:50 AM 5 MIN READ
Cracked wooden crate in roadside grass after research monkeys escaped on I-59, truck hauling 21Cracked wooden crate in roadside grass
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A Tuesday morning in late October on Interstate 59 in southeastern Mississippi, near mile marker 117.

A truck leaves the road and turns over. Neither man in the cab is hurt.

What spills into the grass is a stack of wooden crates stenciled with the words live monkeys.

Inside them are 21 research macaques on their way to a laboratory in another state.

Thirteen stay in their boxes.

Eight do not.

How a crate failure becomes a shooting

The animals in this shipment were not dangerous, and within hours they were being described as if they were.

The county sheriff’s office told the public the macaques carried COVID, herpes and hepatitis C and were aggressive toward people.

That warning went out while deputies were still at the scene with escaped animals moving through cover beside a live interstate.

Five were shot there. The decision was made on information that the shipper corrected the following day.

A spokesman for the university the animals had come from called the disease report erroneous and said the macaques were not infectious.

By then the correction could only change what the public believed. It could not change what had already been decided beside the road.

The crates failed first. The information failed second.

What the accounting actually shows

Of 21 animals, 13 remained contained and were sent on to the research program that had ordered them.

Five were killed by deputies at the crash site in the hours after the rollover.

Three got clear of the scene entirely and were still loose when the road reopened that evening.

One of those three was shot by a woman in her own yard on the Sunday, four days later. A second was found dead by state wildlife officers on the Tuesday after that.

Eight animals left containment. Seven of them did not survive the week.

The truck held 21. The grass held 8.

Why the disease claim was wrong without being absurd

The specific list the sheriff’s office gave was not supported by anything. These animals were neither carrying those illnesses nor described that way by the people shipping them.

The underlying worry has a real basis though, and it is worth stating properly rather than dismissing.

Macaques as a group can carry a herpes virus that is mild in them and serious in people, which is why anyone working with them wears protection and why bites are treated seriously.

Colonies bred for research exist precisely to remove that problem. Animals are screened and certified free of specified pathogens, and that certification is most of what makes them valuable.

So the fear was attached to the wrong animals. A screened colony animal is the least likely macaque anywhere to be carrying what deputies were told it carried.

The worry was reasonable. The target was not.

The one that came back

The last macaque stayed out for roughly a week before a resident reported seeing him, and he was caught unharmed.

He carried a tattoo reading NI 62, which was the only name he had, and it is how he was identified.

Having spent that long outside a controlled environment, he was no longer usable for the research he had been shipped toward.

He went instead to an animal refuge in New Jersey, where staff named him Forrest and where he now lives permanently.

Unusual road cargo tends to be the part of a journey that goes wrong, as with a 400 ton truck moved in one piece across Alberta.

The crash location, the crate labels and the sheriff’s statement are reported by a state newsroom.

The only survivor is the one the program could not use.

What the recovery says about moving live animals

Transport of research primates happens constantly and almost entirely out of view, under contracts that keep the carrier, the route and the destination confidential even after a crash.

That confidentiality is a security measure with a cost. When something goes wrong on a public road, nobody at the scene has a reliable source for what is in the boxes.

The gap here was not between agencies. It was between a first responder needing an answer within minutes and a shipper able to give one the next day.

Crates designed for a warehouse and a loading dock are not designed for a vehicle leaving the road at highway speed. Nothing in the reporting suggests they were required to be.

Route and mode are the whole problem for any awkward load, which is why a wind farm sent turbine blades down a river instead.

The final tally and the fate of the last animal are set out by a local station.

A crate broke on an ordinary morning, and the correction to the warning arrived a day after the shooting.

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Hugo RojasTech Editor & Advisor
Hugo is an engineer with strong technical expertise and deep knowledge of the space industry. Multilingual from an early age, his writing combines technical clarity with a strong interest in science and energy.