Law & Order: Trial by Jury

It's hard to believe how much Jerry Orbach has aged from the time he left the original Law & Order series to the beginning of Trial by Jury. His hair was completely gray and his voice was a little gruff. I wish he were still around to portray Lennie Briscoe on any L&O series, but unfortunately, that won't happen. I just wish the writers of the original series would mention the fate of Lennie Briscoe since retiring from the 27th precinct to show how the other characters felt about their friend and co-worker. I've watched Trial by Jury and even after Jerry Orbach passed away, I don't think the writers ever mentioned his character's death through the other characters, such as Hector Salazzar or Lt. Anita Van Buren from the original series.