'Obsessive' Man Used GPS Device to Track Ex-girlfriend in 'Sinister' Stalking Campaign, Police Say

A British man monitored his ex-girlfriend's movements after secretly placing a GPS tracker on her car as part of a campaign of stalking and is now facing jail.

Keith Martin, 41, described as an "obsessive stalker" by Northumbria Police, pleaded guilty to stalking causing serious alarm and distress for hounding his victim after their relationship had ended.

Martin was found to have placed a tracking device on his ex-partner's car. The device was connected to a cellphone app, which showed the defendant the exact whereabouts of her vehicle.

Police said Martin was also "repeatedly bombarding" the woman with text messages and emails, as well as unannounced visits to her home. In one instance, Martin turned up at the house of his victim's new boyfriend. Police said the "terrified" woman had no idea how the 41-year-old knew where her new partner lived.

The woman contacted police after fearing for her safety. During an inspection of her vehicle, officers found a black box which had been fitted to the underside of the car. Officers later found the device was linked to the app on Martin's phone.

Martin, of Jarrow, North-East England, pleaded guilty to stalking causing serious alarm and distress on January 23. He is due to be sentenced on March 23.

In a statement, Police Chief Wendy Gribben, of Northumbria Police, said: "Martin is an obsessive stalker who terrified his victim over a prolonged period of time.

"His actions were sinister, calculated and intimidating as he struggled to accept the end of their relationship, and he went to great lengths to ensure his victim could not move on with her life.

"Martin would inundate his frightened ex-partner with text messages and emails before leaving flowers at her doorstep asking for another chance. His obsessive behaviour caused a great deal of upset and fear.

"This has been an incredibly distressing series of events for the victim, and I would like to praise her for the incredible bravery that she has shown throughout this investigation.

"I sincerely hope Martin's conviction gives her some kind of closure and allows her to start the next chapter of her life, free of harassment and fear."

In a statement, the victim said she feels "permanently sick and scared" as a result of the ordeal she suffered because of Martin.

"Keith has manipulated me and got into my head," she added. "I am terrified he will do something to my family and carry out a terrible attack on me. He knows everything about me—I am so frightened. When the police officer showed me the tracking device he had found on my car, I felt sick."

 Keith Martin
'Obsessive stalker' Keith Martin faces jail after hounding his ex-girlfriend and secretly placing a GPS tracking device on her car faces. Northumbria Police