Ishmael Roberts said nothing as he arrived unannounced at his mother's north Minneapolis home Monday, wearing a black stocking cap and sunglasses even though it was the middle of the night.
Roberts went inside, according to a criminal complaint filed Wednesday, and killed his mother and teenage nephew with a Samurai sword, then left a bloody trail of evidence in the Iowa city where he was captured that evening.
As murder charges were filed against him in Minneapolis, Roberts, 22, refused to say why he killed his relatives, although prosecutors hinted at mental illness. Police are certain of one thing: Beatrice Wilson, 57, and her grandson Peter, 14, fought for their lives.
"They had multiple lacerations, and the lacerations they had were indicative of a struggle and a vicious fight," said Minneapolis Police Capt. Amelia Huffman.
The complaint said their bodies were found in separate upstairs bedrooms in the home in the 1200 block of 12th Avenue N., where Roberts once lived along with numerous other relatives.
Roberts, who was charged with two counts of intentional second-degree murder, remained jailed Wednesday afternoon in Waterloo, Iowa, where he was captured Monday evening on suspicion of stealing his mother's car, then rolling it over before trying to flee police.
Hennepin County Attorney Mike Freeman said there have been indications that Roberts is mentally ill, although they don't have any concrete evidence. A resident of the home told police that Roberts had not been in contact with his mother or others in the family for about two years, according to the complaint.
Relatives said he was living in the Portland, Ore., area with a sister, where records show he racked up a few minor offenses, including public indecency, theft and trespassing. Authorities say he would not tell them why he returned to Minneapolis or allegedly committed the murders.