Seems to me that these three incidents you've outlined - the suicide, the two men asking to see the house, and now these break-ins where nothing was taken all point to one thing: someone thinks that something of value is in the house. You've received some good suggestions along that line. I think Fiero had a good idea: ask an attorney about having the cops come in to look for drugs or contraband.
Don't forget that if you do startle an intruder...he may have his buddy(ies) around the corner as a lookout/backup.
Don't forget that if you do startle an intruder...he may have his buddy(ies) around the corner as a lookout/backup.