How to track an iphone with IMEI

File a police report with your local police. They can obtain a court order for your cell phone carrier to produce records related to your IMEI.

Apple cannot track IMEI numbers. Only your carrier can.

To add to the above. The carriers will only do this if they are given a court order requiring them to. Unless someone's life is in imminent danger, it's not going to happen.

You can’t

So what if the phone being monitored makes this person feel there indangour from someone who may be close to them how do u maby locate the device or devices with an apple web kit locate these purpretrators

You contact your local police. Apple does not get involved without a court order.