Erin Merdy received a sentence of 20 years to life in prison after pleading guilty to drowning her three children in 2022.The Brooklyn Supreme Court judge delivered the sentence after hearing testimony from family members affected by the tragedy.Authorities discovered the unresponsive children along the Coney Island shoreline following a welfare check request from concerned relatives.The defendant expressed remorse during the proceedings while citing struggles with postpartum depression as a factor in the killings.