NFL's Khalif Barnes Interviewed By Cops In Texas Death Investigation

Ex-NFL lineman Khalif Barnes -- who had a long stint with the Oakland Raiders -- has been interviewed by police as part of an investigation into the mysterious death of a man in Harris County, Texas.

Here's the backstory ... the body of 29-year-old Jordan Davenport was found in a lake on October 31.

Cops are looking into tips that Davenport was involved in a violent altercation with several men on Oct. 27 -- the last day he was seen alive.

We're told ... cops received a tip that 36-year-old Barnes may have been involved in the altercation, so they tracked him down and spoke with him about the incident.

Our sources say Barnes has NOT been named a suspect -- or even a person of interest -- but noted the investigation is just getting started.

Barnes has now lawyered up.

We're also told the investigation has not been deemed a homicide -- at least, not yet. However, officials are conducting an autopsy and the results could change that.

Cops are attempting to speak with anyone who may have information about the incident while they try to put together a timeline showing the events leading up to Davenport's death.

Multiple attempts to reach Barnes for comment were unsuccessful.

Barnes -- 6'6" and 320 pounds -- was selected by the Jacksonville Jaguars in the 2nd round of the 2005 NFL Draft after a stellar college career at Washington. He later went on to play for the Raiders from 2009 to 2015.