A driver for the popular food delivery platform DoorDash has been arrested after allegations that she showered an order with pepper spray in plain view of a doorbell camera, sickening a customer and his wife, according to authorities in Indiana.

Kourtney Stevenson faces counts of felony battery and consumer product tampering, the Vanderburgh county sheriff’s office said in a statement on Friday, addressing a case that is bound to be of significant interest to DoorDash’s 42 million or so users.

Stevenson, 29, allegedly told investigators that she used the pepper spray in question to try to kill a spider that had frightened her, but they did not believe her, saying it was too cold at the time of the delivery for that kind of creature to be out.

In a statement on Saturday, a spokesperson for DoorDash said Stevenson’s “access to the platform has been permanently removed”.

“We have absolutely zero tolerance for this type of appalling behavior … and our team is supporting law enforcement with the investigation,” the spokesperson’s statement added.

The Vanderburgh sheriff’s office said the complaint that led to Stevenson’s arrest arrived at the agency on 7 December. A man recounted that he and his wife had ordered food through DoorDash shortly after midnight. After ingesting their meal, they vomited while also enduring burning in their mouths, noses, throats and stomachs.

The couple reviewed their doorbell camera footage and saw a DoorDash courier later identified as Stevenson place their food on the porch. Before leaving, the woman took a small aerosol can attached to a key chain and sprayed a substance in the direction of the food, the footage showed.

Investigators learned Stevenson’s identity in part through records that they subpoenaed from DoorDash. After detectives reached her by phone, she acknowledged using pepper spray during the delivery that was reported to the sheriff’s office, the agency said.

But, according to the agency, Stevenson maintained she didn’t mean to spray the food and had instead aimed at a spider because she is “terrified” of such creatures.

Detectives noted that the low temperature on the night of the delivery was 35F (1.7C). “At that temperature, outdoor spiders in Indiana are not active and would not be capable of crawling on exposed surfaces,” the sheriff’s office said in its statement on Friday.

Stevenson initially agreed to meet with the sheriff’s office, though the agency later said she backed out. Detectives subsequently obtained a warrant to arrest her.

On Friday, Stevenson was reportedly taken into custody by authorities in her home community of McCracken county, Kentucky, which is about two hours away from Vanderburgh.

She was being held without bail pending extradition to Vanderburgh county, which includes the Indiana city of Evansville. The sheriff’s office said Stevenson was visiting her father in Evansville on the night of the order that she was suspected of tainting.

Sheriff’s investigators did not identify the man who reported Stevenson to them or say where the delivered food came from. The KCBD news channel, however, did identify him, saying he was Mark Cardin, who told the outlet that he had ordered from the fast-food restaurant chain Arby’s for him and his wife.

Cardin said to KCBD that “it’s horrific” to think about all the other ways their food could’ve been messed with “in this day and age”.

“It could’ve been rat poison – it could’ve been fentanyl,” Cardin told the outlet. “My wife could’ve been dead.”

Vanderburgh county’s sheriff, Noah Robinson, said his agency pursued Stevenson urgently because “residents should be able to trust that the food they order for their families is safe”.

“When someone violates that trust and endangers others, we will respond … and we will pursue charges,” Robinson added.