A man has been jailed for a minimum of 18 years after drowning his girlfriend in a pond in St Neots in Cambridgeshire.
26-year-old Robert McWhir held his partner facedown in a shallow pool, after becoming angry with her for texting other men.
McWhir and 29-year-old Marissa Aldrich, who were described as having an on-and-off-again relationship, had been visiting another couple for Christmas drinks.
They left their friends’ home but one of the friends called McWhir to say he had left items at the property.
McWhir said he was killing Marissa and told his friend to come to the wooden bridge in Loves Way, St Neots.
He found McWhir holding Marissa facedown in the water.
A family statement read: "Marissa was a daughter, sister, niece, granddaughter and mother, we all love her dearly and struggle to understand how she was here one minute and gone the next.
"Marissa will always be part of our lives because we will talk about her every day and we will keep the precious memories alive, we will carry her in our hearts every day in everything we do for the rest of our lives."
Detective Inspector Emma Pitts said: “This was a vicious, coldblooded murder for which McWhir has shown no remorse.
“He physically overpowered Marissa, who was more than a foot shorter than him and considerably lighter, and held her under freezing cold stagnant water until she died.
"He only released her when confronted by his friend and by then it was too late.
“Marissa’s family have lost a much-loved mother, daughter, sister, granddaughter and niece due to McWhir’s callous actions and have now had to endure a trial in a case where the evidence very clearly pointed to the guilty party.”