The mother of murdered Victorian woman Hannah McGuire has slammed the 28-year murder sentence handed to the 23-year-old's former boyfriend yesterday.

Hannah's parents Debbie and Glenn McGuire were visibly distraught in court yesterday when they learnt her ex-boyfriend Lachlan Young would be jailed for 28 years, with a non-parole period of 22 years and four months, for murdering the young teacher's aide after months of sustained abuse.

Today Mrs McGuire spoke out about the "heaviness" she felt at the "out-of-proportion sentence".

"Hannah's life was worth so much more than 22 years of his," she wrote in a statement sent to 9News.

"We feel completely unsupported by the system that was supposed to deliver justice.

"The outcome did not honour her."

Mrs McGuire also revealed parts of h

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