emilie ikeda has details. >> reporter: five years since connecticut mother jennifer dulos' disappearance, tonight the woman convicted of helping plan and cover up her killing alongside dulos' estranged husband now knows her fate. the judge sentenced michelle troconis to 20 years in prison. >> suspended after 14 1/2 years, 5 years probation. >> reporter: following heart-wrenching statements from dulos' family. >> for years we searched for her remains, tracking down every lead. >> reporter: troconis appearing emotional as the victim's daughter spoke, just 10 years old when she lost her mom. >> michelle troconis to me is the reason i feel completely lost and alone on nights when i cannot sleep. she's the reason why i've blocked out my childhood and that day so much i can barely remember it. >> reporter: jennifer dulos went missing in may of 2019 and police zeroed in on her estranged husband, troconis' boyfriend, who sat down with nbc's "dateline" before he was charged with murder and later died by suicide. >> fotis, did you have anything to do with jennifer's disappearance? >> i did not but

michelle troconis convicted of helping her then boyfriend murder his estranged wife, jennifer dulos, hearing from dulos' children in court. >> michelle troconis to me is the reason i feel completely lost and alone at nights when i cannot sleep. >> gio: the time she'll be spending behind bars. >> janai: caught on camera, explosion aftermath. >> back off, back off, back off. >> janai: the harrowing new body camera video showing the moments after that deadly blast at a building in youngstown, ohio, as we learn more about what caused the explosion. >> whit: ready for liftoff. boeing's starliner spacecraft scheduled to launch just hours from now on its mission to the international space station. the second attempt at getting off the ground. can it help restore the company's battered reputation? >> gio: and no go for j.lo. ♪ every heartbreak was a yellow brick road ♪ ♪ pointing me straight just taking me home ♪ >> gio: the superstar canceling her summer concert tour. her message to fans. ♪ i was on my way to you ♪ >> gio: and we do say, good morning, america. it is feeling a lot like summe

i've been left with a hole inside of me that i know i will never be able to fill. >> reporter: jennifer dulos disappeared five years ago. after his arrest, husband fotis dulos took his own life, but prosecutors put troconis on trial, showing this video they said proved she helped dulos dispose of the evidence. dulos' daughter, kristiane, who was just 10 years old, saying this about the woman who conspired to kill her mom. >> michelle troconis, to me, is the reason i feel completely lost and alone on nights when i cannot sleep. she's the reason i blocked out my childhood, and that day, i can barely remember it. >> reporter: through tears, troconis' only child asked the judge for mercy. >> i'm begging you to listen. i need my mom in my life. >> reporter: michelle troconis then making her own plea. >> i deeply regret ever being in a relationship with fotis dulos and bringing my daughter, my family, and myself into our lives -- into his life. >> reporter: the judge sentencing troconis to 14 1/2 years. michelle troconis maintains her innocence. the family and friends of jennifer dulos had asked th