DOYLESTOWN, Pa. (CBS) — A man who police shot during a standoff and shootout in Doylestown has died more than one week later. The Bucks County District Attorney’s Office says 60-year-old Thomas Zeller had been hospitalized since the standoff in the Olde Colonial Greene residential community on Feb. 20.

A neighbor told CBS at the time that Zeller was a veteran who suffered from PTSD.

It’s unclear who fired first.

The shooting remains under investigation.