A truck driver was speeding and reaching for his iced tea when he crashed his rig into a line of cars, killing a mother and her twin toddlers in a fiery wreck on I-465 Sunday, court records say.

Bruce Pollard's negligent driving caused a five-vehicle crash on eastbound I-465 near Keystone Avenue shortly after noon on Sunday, Indiana State Police said in a preliminary probable cause affidavit filed late Monday in Marion Superior Court.

The crash killed Indianapolis mother Alanna Norman Koons, 29, and her 18-month-old daughters June and Ruby Koons after their car caught fire. Seven others were injured.

According to the court document:

Pollard was in a State Police interview room when an officer told him the wreck had killed several people.

"Mr. Pollard did not have any remorse," State Police Officer Joseph W. Malone wrote. "Mr. Pollard was only concerned for his (belongings), medicine and what hotel that we are dropping him off at."

Pollard initially told police he was traveling about 35 mph when he crashed the semi tractor-trailer, but the vehicle's computer data said it was going 65.

The crash happened when vehicles were slowed in a construction zone.

Charges: Driver charged with reckless homicide in I-465 crash

He told investigators he swerved to avoid a car that cut him off, but later admitted he was distracted.

"He stated that he was reaching for his ice tea to drink and when he looked up he saw that traffic had stopped," Malone wrote. "Mr. Pollard stated that he attempted (to) apply his brakes but that they locked up on him.

"Mr. Pollard stated that he 'guesses' that he was going too fast and did not mean to strike the other vehicles."

The truck struck the vehicle carrying the mother and her twins and five other vehicles, police said. One car was dragged 300 yards before hitting two other cars. Debris from the crash spread along three-quarters of a mile, the Indianapolis Fire Department said.

Flames engulfed the car carrying Koons and her daughters. The intense fire burned the surrounding area and a guard rail.

Pollard, 57, Sturgeon, Missouri, remained in the Marion County Jail Tuesday on preliminary charges of criminal recklessness and reckless homicide, records show. He is scheduled to appear in court on Thursday.

Koons was a stay-at-home mom who adored her daughters, her friend Ashley Allen told IndyStar.

"She was very selfless and down to earth, humble and thoughtful," said Allen, who met Koons more than a year ago through a club for parents of twins and multiples.

"We enjoyed having play dates and meeting up at the library for story time with our twins," Allen said. "This is truly a great loss to her family, friends and the community. She will be missed so much."

The Koons family issued a statement through the Church of Jesus Christ of Latter-day Saints on Tuesday thanking the public, police, medics and others who have shown support.

"We are broken-hearted by their loss but sustained by our faith," the family said. "We believe in a loving Heavenly Father who comforts his children in the midst of their most painful trials. We are steadfast and confident in knowing that our family will be reunited in the life to come."

A GoFundMe has been set up to assist the family with expenses. As of Wednesday morning, the $50,000 goal has been surpassed.

What we know:The I-465 crash that killed Alanna Koons and her twin daughters

Related:Mother, twin toddlers killed in I-465 crash identified

Call IndyStar reporter Vic Ryckaert at 317-444-2701. Follow him on Twitter: @VicRyc.