Hi i'm sorry to hear about your father in laws problem.
What you did so far is perfectly alright however the problem lies in the fact that most diseases which are transmitted via tick bites can start several days to weeks later. You need to watch out for the following symptoms in your father in law such as, fever, weakness in limbs, any rash, nausea and vomiting, shortness of breath, numbness, confusion, headache or paralysis among others.
In such a scenario you need to immediately take him to your nearest hospital. Also since he has a swollen ear lobe it is possible that a portion of the tick might be left inside. In such a case its best to take him your local doctor who can thoroughly examine the site and remove any part of the tick left inside. Apart from what you have already done for him at home and watching out for the symptoms i have listed above there isn't much else you can do right now.
Do get an examination from the doctor for the swollen ear lobe to see if its infected or any portion of the tick is left inside.
I hope this answers your question
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