SAN ANGELO, Texas -

Frederick Mueller, 49, a San Angelo man accused of murdering his wife has been transported back to Colorado where the alleged murder happened.

According to the Hinsdale County Sheriff Ronald Bruce, Mueller was transported from the Tom Green County Jail in San Angelo to the Gunnison County Jail in Colorado on Friday.

Dr. Leslie Mueller died in 2008 on the couple's Colorado property in an incident that was originally ruled an accident.

After nearly four years of investigation into her death, a Colorado district attorney said he now believes Leslie Mueller died from drowning.

Her husband was arrested in connection to her death on Feb. 6.