that's where the bodies of savas and amy savopoulos and their housekeeper were found. court documents say the bottles were never collected or processed as evidence. >> how do you know that thatt we and his other compatriots didn't go in there and touch those wrer bottles o touch the refrigerator door. >> reporter: the pro is we'll never know, but longtime law enforcement agents don't agree that potentially missed tours and collecting evidence will impact thecase. >> i don't see these as insurmountable problems. these are garden variety problems that we encounter in virtually every case. i thinkirefighters do their best. atf does its best and mpd does its best. >> reporter: but the jurors have to convi wen beyond a reasonable doubt and grim believes this document just do. >> in the end you could have a jury come back with a not guilt verdict because the evidence technicians screwed up in this case. it's beyond -- i mean, it's beyond comprehension. >> reporter: the d.c. fire department wasn't aware of these allegations until weontacted them. they tell us it's now part of

nearly a week before the only suspect goes to trial daron wints accused of killing savvas and amy savopoulosr young son and housekeeper three years ago. investigators say he then set that house on fire tore cover up the crime. >> jody fleischer obtained court filings detailing questions about what evidence was and was not collected at the crime scene. >> reporter: it was a shocking crime in a wealthy d.c. neighborhood. three members of the savopoulos philly and their housekeeper tortured and murdered. the call initially went to 911 as a house on fire. they believe it was intentionally set in an effort to mask idence. >> burning evidence i think in the minds of some of the criminals that we deal with is much more effective way to get rid of evidence than it is. >> reporter: glen kershner spent decades as a prosecutor and studie tasd cors f mose signifi is that crime scene investigators did recover dnahi evidence w prosecutors say matches the defendant daron wint. but from e beginning police believe there were other suspects and never charged anyone else. they never reported recovering yone el

37-year-old is the lone person accused in the members of the three members of the savopoulos family. savvas and wife, amy and son philipir and tousekeeper back in the fall of 2015. he was in d.c. superior court today a his trial is just about to begin. >> a tragedy for all sorts ofas . >> reporter: an attorney who has been watching this case and an accused person has right to a speedy trial, legal experts say sometimes a not so speedy trial plays a role in the jury selection. >> you want jurors to forget about it. you want jurors to think, do i know something about that case or not? you don't want it to be of recent memory. unfortunately, your client has to sit in jail who they're waiting. >> reporter: spent hours going back and forth over things like the jury selection process and what evidence can be presented. like so ma cases lately, online activity could be a ctor in this trial. >> social media has put a lot of people in prison. it got a lot of people out. >> reporter: they want to look at the defendant's facebook activity. notuthat he typed when he was typing it. during the 19 hours the family was