Documents reveal new details in Big Island double homicide - Hawaii News Now - KGMB and KHNL

Documents reveal new details in Big Island double homicide

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Rhonda's boyfriend, the suspected murderer, 34-year-old Sean Ivan Masa Matsumoto. Rhonda's boyfriend, the suspected murderer, 34-year-old Sean Ivan Masa Matsumoto.
Victims Elaine Ahu and her daughter, Rhonda Ahu. Victims Elaine Ahu and her daughter, Rhonda Ahu.
Masayuki Matsumoto Masayuki Matsumoto
Sean Ivan Masa Matsumoto (in black shirt) in court Sean Ivan Masa Matsumoto (in black shirt) in court
HILO, BIG ISLAND (HawaiiNewsNow) -

The Hilo man accused of murdering his girlfriend and her mother appeared in court for the first time today.

34-year-old Sean Ivan Masa Matsumoto has been charged with first degree murder and two counts of second degree murder. Matsumoto is accused of killing his 45-year-old girlfriend, Rhonda Ahu, and her mother, 74-year-old Elaine Ahu.

According to the charges filed with the Hilo District Court, Matsumoto called 9-1-1 Monday night to report he shot two people. When police arrived at the home in the 600 block of Leilani Street, they discovered a shot gun inside the living room. According to arresting officers, Matsumoto said: "I'm sorry, I know I had the gun in my hand, is my son okay?"

In addition to the murder charges, Matsumoto also faces several firearm charges and a count of reckless endangering.

Matsumoto is being represented by public defender, Sherilynn Tavares. Tavares' request for reasonable bail was denied by Judge Harry Freitas. Matsumoto will continue to be held without bail.

Matsumoto's grandfather was in court today to support his grandson.

"Oh, I'm sorry about the whole incident. I'm so depressed I cannot sleep at night," said Masayuki Matsomoto, before adding he tried his best to care for his grandson and "straighten him out".

Matsumoto is facing life in prison without the possibility of parole.

Autopsies on both victims are scheduled for Friday to determine the exact cause of death.

Police ask that anyone with information on this case to call Detective Ernest Matsumoto at 961-2379 or email at ematsumoto@co.hawaii.hi.us or Detective Joel Field at 961-2381 or email at jfield@co.hawaii.hi.us Tipsters who prefer to remain anonymous may call Crime Stoppers at 961-8300 in Hilo or 329-8181 in Kona and may be eligible for a reward of up to $1,000. Crime Stoppers is a volunteer program run by ordinary citizens who want to keep their community safe. Crime Stoppers doesn't record calls or subscribe to caller ID. All Crime Stoppers information is kept confidential.

Related Story:

EXCLUSIVE: Hilo double murder victims identified by family

Suspect in Hilo double murder charged

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