Steve Neavling

The FBI is investigating whether a Houston police officer used excessive force by fatally shooting a double-amputee in a wheelchair at a home for the mentally ill, the Associated Press reports.

The AP said police were responding to a call about an irate one-armed, one-legged man who wouldn’t come down.

One of the officers said he shot the 45-year-old amputee in the head because he felt cornered by the wheelchair and feared his partner was in danger by what turned out to be a ballpoint pen, according to the AP.

“It is my desire to have everyone reserve judgment until all the facts and evidence in this investigation have been gathered,” Houston Police Chief Charles McClelland said.