. >> dr. allen is revered for developing the triploid oyster. a sterile oyster that doesn't become thin and watery in the summer months like a reproductive oyster does. >> oysters have been described as reproductive machines inside two shells, and so, if we can shut down that reproductive mechanism, we can get the oyster to devote that otherwise rereproductive energy into beina robust and meaty oyster. >> so, what that does for us as an industry is, first of all, it gives us an extraordinary oyster. it's 30 to 50% higher meat yield. it grows so fast that those diseases, really, don't have time to kill it. and it doesn't spawn so it's available year round for consumption and for sale. >> ecology and culture often clash when it comes to managing oysters. when you come right down to it, watermen, scientists, and everyone who lives in the chchesapeake bay watershed, all want the same thing, a teeming, healthy, sustainable bay. oyster restoration is one giant step toward that goal. >> "spat" is the title of my film and that's appropriate for my film

. >> dr. allene fda for tissue donation and handling tissues and eggs. he told us there is no regulation on the tanks themselves, leaving doctors to maintain safety precautions on their own. those affected told us they are investigating the incident. >> so upsetting, the whole thing. >> every time i think about it and think about the women who thought this could be their only hope, it's devastating. >> such an investment, financially, emotionally, physically. >> thank you, tara. >>> thieves could still $1.5 billion in tax refunds this year. there's mellody hobson in our green room. she has tips to protect yourself from identity theft this season. we'll be right back. >>> federal trade commission is warning taxpayers about a new and growing tax scam pay attention. identity thieves stole at least $1.6 billion in tax refunds in 2016. as cbs news previously reported, scammers typically pocket your refund before you file. the irs calls this latest scheme a new twist on that scam. after filing a fraudulen

. >>> actor allen cummings is taking on a new reel on the cbs drama called "instinct". >> he plays drdylan rinehart who ends up helping new york police after a killer starts planting crimes based on his book. earlier today i had a chance to chat with him about the show. >> what made you say i want to take on this role? >> there are so many different facets to him. one of the biggest things that drew me to it is i'm gay, the character is gay and he's married to a man. it's the first ever network drama in american television with a gay character in the leading role. i thought i wanted to be a part of that. >> instinct premiers this sunday night at 8:00 p.m. here on kpix5. >>> we are happy to be sponsoring the regional final of the bay area spelling bee this weekend. top spellers from bay elementary and middle schools will compete for a chance to go to the scripps national bee in may. >> and it is really tough. here's a little test for a's mascot stomper. >> todays word of the day is vertigrease. it means a blue or silver deposit on copper or bronze surfaces. >> so let's see what he does

allen martin. >> i'm elizabeth cook in for veronica tonight. more than 1,000 people are expected to pay tribute to christine loeber, dr. jennifer golick and dr.nzales. the pathway home employees were killed earlier this month by an army veteran who had been kicked out of the treatment program. kpix5's katie nielsen joins us live from yountville where the memorial service is beginning right now. katie? >> reporter: liz, the memorial service is starting right now here at the lincoln center on the yountville veterans home campus. a few moments ago they put out signs saying the theater is at capacity. nobody else will be allowed inside. now the doors to the theater opened about an hour and a half ago. we've seen local community leaders, law enforcement as well as friends and family members all go inside to pay tribute. outside a group of more than a dozen members of the american legion are standing holding american flags honoring the women who gave so much to their veteran community. >> part of where we come to pathways was christine, her passion and dedication that she gave to us veterans. we knew these ladies. they worked with us. we'd given th