According to media reports the suspect left his car running at the curb before jumping over the fence to get into the A321.
From the FAA pilot database:
Personal Information
NISHAL KIRAN SANKAT
#40 ARNOLD BATES CIRCULAR DRIVE
ST AUGUSTINE
Country: TRINIDAD & TOBAGO Medical Information:
Medical Class: First
Medical Date: 1/2014MUST WEAR CORRECTIVE LENSES.Certificates COMMERCIAL PILOT
Certificates Description
Certificate: COMMERCIAL PILOT
Date of Issue: 1/10/2018
Ratings:
COMMERCIAL PILOT
AIRPLANE MULTIENGINE LAND
INSTRUMENT AIRPLANE
PRIVATE PRIVILEGES
AIRPLANE SINGLE ENGINE LAND
Limits:
ENGLISH PROFICIENT.