Disruptive tenant and definintion of quiet enjoyment

[Mary lou L.]

My property manager (Unofficial he collects an sends rent and I hire him for repairs) sent me pics of the tenant parking on the lawn. There are complaints from neighbors about the tenant getting drunk and just being a boor and yelling at them.. No police reports, just neighbor complaints.

In the lease it states "Quiet Enjoyment" I took this to mean that no disruptive behavior and such, but on further research, it is interpreted as landlord not "bothering" tenant. (Granted this was from a pro tenant site. but I just wanted some advice on how to proceed. I am preparing a letter addressing the parking on the lawn, and let him know about the complaints.  Do I need police reports to corroborate the complaints? I do not want to identify who complained, If I do not have to.

This property is in Texas. If there are Texas landlords who might have advice regarding particular laws, I would love to hear from you!

Thanks!