Search results showing incorrect modified date

Hi All,

I have a one difficulty in search results.

Document showing incorrect modified date in search results. And this happens for one document only.

We have customized the search/results.aspx page, Our document is showing correct modified date in document properties,All Items.aspx like 31/4/2013.

But when i search with document name in search, result showing incorrect modified date like 24/6/2004.

I checked with database in SQL, every thing is fine.

I have updated the Modified date through powershell script for one document and after that this recent modified date is showing in search results.

But after updating the Modified date through powershell, issued document not showing the recent modified date in search results. still showing as 24/6/2004.

I should not do edit property and save, to create new version.

I don't know what is happening in search crawl. All ready full crawl running daily basis.

I want to check whether this issued document is crawling or not. Could anybody help me to get out of this. what is the main cause of this issue.

Thanks & Regards

MD.Liakath ali