Tests confirm Sausalito man was killer in murder-suicide

A Sausalito man shot and killed his girlfriend in July before using a second gun to kill himself, police said Friday, citing the results of forensic testing.

The man, 51-year-old Robyn Chan, used a .357 revolver to kill Mara Truly, 42, before using a 9mm semiautomatic pistol to take his own life, said Sausalito Police Chief Jennifer Tejada.

The couple were found in a home on the 100 block of San Carlos Avenue after police responded to reports from neighbors of gunfire just after 2:30 a.m. July 20, police said.

Five weapons were recovered from the scene — four registered to Chan and one unregistered, police said. One of the weapons was an AR-15 rifle, and two of the weapons had high-capacity magazines, authorities said.

According to a LinkedIn profile for Chan, his most recent job was with software company SAP SE as senior vice president of mobile platform development.

In a separate Sausalito case, police said a man who allegedly killed his landlord at his home used a crowbar after the two argued about the defendant’s pending eviction.

Conrad Smith, 51, allegedly attacked David Richard Morgan, 57, on Dec. 11 at Morgan’s home on the 600 block of Nevada Street. Smith later surrendered. He is awaiting a preliminary hearing on a murder charge.

Henry K. Lee is a San Francisco Chronicle staff writer. E-mail: hlee@sfchronicle.com Twitter: @henryklee