A Florida man faces charges after allegedly attempting to reconcile with his ex-girlfriend through a barrage of messages, sending handwritten letters—one of which reportedly included a live 9mm bullet—and secretly placing a GPS tracker on her car.

Jakir Hasan, 23, was arrested on Wednesday and is charged with aggravated stalking and illegally installing a tracking device, according to official records.

Broward County Sheriff’s deputies responded around 2 p.m. on January 28 to a residence on the 5300 block of Godfrey Road in Parkland following a complaint from an adult female about harassment by her former boyfriend, the affidavit states.

The woman reported that Hasan had been persistently “harassing her through text messages, handwritten letters, and social media posts” for approximately six months. Their relationship, which lasted about two years, ended roughly eight or nine months ago. She noted that they never cohabitated and do not share any children.

Initially, Hasan’s communications involved him expressing a desire to rekindle their relationship and declaring his continued love for her, but his actions have allegedly intensified in recent weeks.

On January 11, the woman discovered a handwritten letter on her driveway around 2 a.m., which she confidently identified as Hasan’s based on its content.

“The envelope contained two long letter and a short letter with a live 9mm round inside,” the affidavit reads. “The letter detailed how he messed it up with her and asked to get back with her because he loves her very much.”

The victim said that as she was inundated with messages from Hasan, she would block his number and social media accounts, but that would only lead to him using different numbers and accounts to contact her, according to deputies.

In one such message, she claimed that Hasan had “threatened to shoot her new boyfriend,” according to the affidavit.

On Jan. 27, the victim said she found an Apple Airtag on her car, which would show the user realtime location information.

“She had been alerted by Apple that the tracker was there,” the affidavit said. “Through her phone, she set the tracker to make a noise, which revealed the exact location of the tracker.”

The victim said Hasan had a black handgun and had recently “made some suicidal comments” in one of his letters.

In an interview with investigators, Hasan allegedly admitted to writing the letters to the victim, sending her the 9mm bullet, and placing the tracker on her car.

The defendant was then arrested and booked into the Broward County Jail and held on $10,000 bond, jail records show.

It was not immediately clear when Hasan was scheduled to return to court.