Volunteers continue their search for a Texas teen who reportedly vanished from her Dickinson home late last month.

KTRK reports that Arionna Parham, 18, left her older sister’s home on May 23 and hasn’t been heard from since. Since then, Equusearch volunteers have conducted multiple searches on foot and using ATVs but have found no sign of the teen.

Parham reportedly suffers from asthma and left her inhaler behind. She also left her cell phone, according to the station.

The teen’s sister told KTRK that a man who recently started driving Parham home from school could have information regarding her disappearance. However, she said she didn’t know the man’s identity.

EquuSearch’s Tim Miller said he expected more tips to come in about the missing 18-year-old.

“It was a cold case before we got it,” he said.

Volunteers temporarily suspended their search for Parham last week, citing extreme temperatures. They reconvened their search on Monday, KPRC reported.

“I don’t want to say what I think happened,” Parham’s aunt told KTRK.

“Cause now I feel it in my gut that something ain’t right.”

Parham was described as being  5’4″ and 125 pounds and having black hair and black eyes.

This is an ongoing investigation. Anyone with information regarding Arionna Parham’s whereabouts is urged to call Dickinson police at 281-337-4700.

[Featured image: Arionna Parham/Dickinson Police Department]