MLive Muskegon Chronicle is following this developing story and will post updates as they happen.

UPDATE: 'Hero' girl, 16, helped break Bletsch homicide case, prosecutor says

MUSKEGON, MI - Jeffrey Thomas Willis is being charged with murdering Rebekah Bletsch.

An arrest warrant was authorized by the Muskegon County Prosecutor's Office and was sworn by a police detective in a probable-cause statement this morning before a 60th District judge.

The warrant charges Willis with open murder and felony firearm in the jogger's long-mysterious shooting death June 29, 2014.

In two additional arrest warrants, Willis is being charged with multiple counts of manufacturing child pornography, copying child pornography and using a computer to commit those felonies.

Ballistics matched Willis' .22-caliber handgun seized from his minivan with bullets found in Bletsch's body during an autopsy and shell casings found at the scene of Bletsch's homicide, a detective said under oath.

Chief Judge Raymond J. Kostrzewa signed the murder warrant at 10:14 a.m. He denied interim bond. Willis is already in the Muskegon County Jail.

He signed the child-pornography arrest warrants as well. In both those cases he set interim bond at $250,000 cash or surety.

Willis was expected to be arraigned Wednesday in all three cases.

Bletsch, 36, was discovered lying on the shoulder of Automobile Road near Riley-Thompson Road in Dalton Township less than a mile from her home. Police believe she had been jogging and was shot several times in the head shortly after 6 p.m. that day.

Willis, 46, of Muskegon Township was charged last week with kidnapping, assault with a dangerous weapon and two felony firearm counts for the gunpoint abduction of a 16-year-old girl April 16 on West River Road in Fruitland Township. The girl escaped by jumping from a moving minivan and running to a nearby home after the driver pulled a gun, she told police. The girl later identified Willis as her abductor from a photo lineup.

According to the arrest warrant in the kidnapping case, it's alleged that Willis "did knowingly restrain a 16-year-old child with the intent to engage in criminal sexual penetration or criminal sexual contact with that person, or engage in child sexually abusive activity with the minor victim."

When police searched Willis' van, they found a .22-caliber semi-automatic handgun and ammunition. They also found five syringes, one filled with clear liquid, handcuffs, rope, chains, a mask, rubber gloves, batting gloves, a bar with wrist restraints, a ball gag, and "photos of females chained and bound," according to a court transcript of a police detective's sworn statement to a district-court magistrate. The detective didn't specify whether the chained "females" were women or under-age girls.

At Willis' home, police found a computer thumb drive the detective said contained images of child pornography and videos of women bound, taped and gagged.

Willis is also a "person of interest" in the April 2013 disappearance of Jessica Heeringa from the Norton Shores gas station where she worked, according to Norton Shores Police Chief Jon Gale.