A phone app led police to arrest a second suspect tied to a carjacking on UTC's campus. 
The victim's cell phone was in the car and he used a location app called "Find My I Phone" to track it.
The signal led officers to 18-year old Javier Dion Lansden.  He faces multiple charges including carjacking.
21-year old Antonio Evans also faces charges in the case.
UTC administrators say because of the recent carjacking, they are taking more safety precautions. 

Chuck Cantrell, UTC, "We have added additional patrol's recently because of these incidents to make sure, a lot of it's just because we want to make our students feel safe."

Cantrell says they have added two patrol officers on their evening shifts to give students a piece of mind. 

UPDATE: A second person has been arrested in connection to a carjacking on UTC’s campus.
Javier Dion Lansden, 18, is charged with carjacking, possession of a firearm with the intent to go armed and possession of a firearm during the commission of a felony.
According to court documents, the victim told police the suspect approached him doling a handgun, placed the gun to his head and pulled him from his car on October 9. The victim’s cell phone was still in the car when the suspect drove off, allowing the victim to activate the location app that showed the location of the phone. Officers were dispatched to the phones location, 3719 Hemingway Drive. The car was not located.
Officers later came in contact with Lansden, who they say was in possession of the cell phone belonging to the suspect. Police constructed a lineup and the victim identified Lansden as the man who stole his car.
Lansden is due in court on October 19.

PREVIOUS STORY: Chattanooga police have arrested the man they say stole a car from a UTC student last week.
Police arrested Antonio Evans, 21, on Sunday and charged him with theft of an auto, evading arrest, unlawful carrying of a weapon and felony possession of a firearm.
According to court records, an officer was on patrol Sunday evening when he noticed a white Ford hatchback matching the description of the vehicle taken from UTC campus on Friday morning. The officer chased the vehicle onto Interstate 24 and onto Moore Road, where the driver of the stolen vehicle struck two vehicles that were waiting at a red light. Three black males got out of the car and took off on foot.
During the search for the suspects officers found a 9mm handgun and a loaded glock.
Police later received calls about a suspicious person in the area. They located Antonio Evans and took him into custody. Evans was wearing a GPS bracelet on his leg as part of his probation when he was arrested. A check of the tracking device showed Evans was in the stolen Ford and in the location where the weapons were dropped.
Evans is a convicted felon and on state probation due to a felony theft. He is also a validated gang member and was out of jail on bond for an aggravated criminal trespassing charge.