You can not force a tenant to honor a term lease.Do as suggested and try to negotiate a termination settlement and if that goes badly threated court action.

I have completed a one year course in university and will be moving onto a 4 year course next year in Cyber Security.

Move on with life, don't let her threats bother you. 

WIthholding information until the last possible second, making last-minute demands with threats of "do this or we'll cancel the contract" and they were under the gun since they were transferring across country. 

The A/C unit in my rental froze up one day during peak summer (in July). I was out of town and I authorized my tenants to contact an AC repair company as my regular AC guy had retired.The AC repair company sent a tech...

There is no agreement and we don't want to continue with someone that is threatening a lawsuit and trying to force a sale based on threats. 

You aren't lowering a  potential criminal threat to the neighbors.

Unfortunately anything above a 15 year fixed seems a bit risky, especially with the threat of a possible economic crisis upon us.

No late or missed payments by the owners since the mortgage. may 5th, 2011, under threat of foreclosure son issues himself as mortgagee a forced 10 month simultaneous addon of $3,102.60 to the mortgage as a result of him redeeming property tax certificate.

They sound like they are trying to get money out of you with the threats.