Many pest removal companies offer inspection services to spot infestations and other animal-related problems.  

(I just had a tenant move out and it is infested with roaches!

Once inside the property, I was shocked because the property had the worst cockroach infestation I had ever seen.

Hi guys, So I am very close to owning the house, but I just found out that the house might have roach infestation.

At the time I didn't know much about them since we had just purchased the property.After they moved out, we discovered that there was a severe infestation of bed bugs and cockroaches and the carpets were soaked through with dog urine, among other things.

More of the termite-infested room.

I had an executed contract fell apart with Fannie Mae due to black mold.That house had termites too, active termites, not "evidence of termite damages" which could mean live termite infestation or past termite infestation. 

I used to use a product that would be suitable for the food industry or healthcare industry but found that it doesn't always work with the infestations that you would find in a long-time vacant property.I have since been using a product called Termidor(no relation to them in any way) and have been very satisfied with it.

The house is infested and the dog is gone.

I am interested in possibly buying this duplex, but how do I know for sure if it is infested with bed bugs or not?