The biggest tragedy that probably happened there is that the owners were not able to pay their mortgage and lost it to foreclosure.
In Arizona, if anything "tragic" (suicide, murder, etc) happened there the owners are in no obligation to disclose - if it is not a material fact to the value of the property. Although there are always ways to find some info, your agent should be able to send you in the right direction.
ABR - Accredited Buyer Representative
What do you mean tragic? I did Google the address and found nothing regarding this specific house. Please let me know if I can answer more specific questions.