MINNEAPOLIS — The Mankato home of a man and woman charged in an investigation into a synthetic drug that may have killed two people was littered with drug paraphernalia and capsules containing white powder — some within reach of a toddler, according to charges filed Thursday.

The home of Tyler Caputo and his girlfriend, Skylar Jo Reichel-Schneider, also contained small blue baggies with crown designs on them, the criminal complaints said.

Police believe a synthetic form of LSD or cocaine was sold in similar baggies, and that a 22-year-old man and a 17-year-old girl had used the drug shortly before they died. Police haven’t confirmed that the drug caused the deaths, but it is suspected.

Caputo and Reichel-Schneider are among four people facing various drug charges. Mankato police Cmdr. Dan Schisel said Thursday the investigation is ongoing and there could be more arrests.

Caputo, 21, and Reichel-Schneider, 19, each face four counts, including selling drugs to someone under 18 and child endangerment. James Inman, 30, faces one count of selling drugs. A 15-year-old boy was also charged.

The adults were appointed public defenders, but individual attorneys hadn’t yet been assigned Thursday afternoon, said Carrie Leone, who manages public defenders in Blue Earth County.

Authorities were called to a home March 5 and found Louis Folson, 22, not breathing. He was pronounced dead at a local hospital. On Saturday, authorities were called to another home where 17-year-old Chloe Moses was having a seizure. She was taken off life support Monday.

Police recovered small blue baggies with crown designs at each scene, and believe the baggies contained a drug called 2-C, which has caused accidental overdoses elsewhere. In 2011, one teen died and 10 others became ill after several people used it at a party in Blaine.

According to the criminal complaint, Moses’ boyfriend told investigators he got the drug from another juvenile, and that both he and Moses used it before she died. A search warrant of that juvenile’s home yielded clear pill-style capsules and the blue baggies.

The complaint said Inman acknowledged he provided the drug to Folson, and that he got it from Caputo around March 1, packaged in clear capsules. Inman told police Caputo also gave him baggies with crown emblems.

Around 10 p.m. Tuesday, officers searched Caputo’s and Reichel-Schneider’s house. The complaint said they found several baggies, suspected marijuana pipes, a pill crusher, snort tubes filled with a powder residue, a digital scale and many other items.

There was also a suspected mushroom grower in the closet, which Caputo claimed was not his, the complaint said. Drug task force agents found more white powder-filled capsules, a baggie containing 10 grams of brown powder and a baggie containing 30 grams of light tan or pink powder in a safe. The safe also held baggies with powder and “2CE” and “2CI” written on them.

Caputo acknowledged he had access to the safe but told police it belonged to a juvenile, the complaint said.

In the kitchen, agents found a small Mason jar containing marijuana next to baby food.

The complaint said “several of the suspected drug paraphernalia and other related items, including the capsules of an unknown substance and the psilocybin mushroom grower, were accessible to a juvenile toddler, who also resides in the residence.”

The Free Press of Mankato reported that the victims lived about three blocks apart, but it appears they didn’t know each other.

Schisel said police urged anyone who has the potentially deadly substance to turn it in.

“We definitely wanted it off … the streets,” Schisel said.