diff --git a/proc/proc_windows.go b/proc/proc_windows.go
index 41948daa..abd302be 100644
--- a/proc/proc_windows.go
+++ b/proc/proc_windows.go
@@ -544,6 +544,9 @@ func (dbp *Process) resume() error {
 }
 
 func killProcess(pid int) error {
-	fmt.Println("killProcess")
-	return fmt.Errorf("not implemented: killProcess")
+	p, err := os.FindProcess(pid)
+	if err != nil {
+		return err
+	}
+	return p.Kill()
 }
diff --git a/proc/ptrace_windows.go b/proc/ptrace_windows.go
index 066d4084..96e347ba 100644
--- a/proc/ptrace_windows.go
+++ b/proc/ptrace_windows.go
@@ -9,5 +9,5 @@ func PtraceAttach(pid int) error {
 }
 
 func PtraceDetach(tid, sig int) error {
-	return fmt.Errorf("not implemented: PtraceDetach")
+	return _DebugActiveProcessStop(uint32(tid))
 }
diff --git a/proc/syscall_windows.go b/proc/syscall_windows.go
index 848a3951..3154ad69 100644
--- a/proc/syscall_windows.go
+++ b/proc/syscall_windows.go
@@ -89,4 +89,5 @@ func _NT_SUCCESS(x _NTSTATUS) bool {
 //sys	_DebugBreakProcess(process syscall.Handle) (err error) = kernel32.DebugBreakProcess
 //sys	_WaitForDebugEvent(debugevent *_DEBUG_EVENT, milliseconds uint32) (err error) = kernel32.WaitForDebugEvent
 //sys	_DebugActiveProcess(processid uint32) (err error) = kernel32.DebugActiveProcess
+//sys	_DebugActiveProcessStop(processid uint32) (err error) = kernel32.DebugActiveProcessStop
 //sys	_QueryFullProcessImageName(process syscall.Handle, flags uint32, exename *uint16, size *uint32) (err error) = kernel32.QueryFullProcessImageNameW
diff --git a/proc/zsyscall_windows.go b/proc/zsyscall_windows.go
index 8ab0aba3..ee2b33ca 100644
--- a/proc/zsyscall_windows.go
+++ b/proc/zsyscall_windows.go
@@ -24,6 +24,7 @@ var (
 	procDebugBreakProcess          = modkernel32.NewProc("DebugBreakProcess")
 	procWaitForDebugEvent          = modkernel32.NewProc("WaitForDebugEvent")
 	procDebugActiveProcess         = modkernel32.NewProc("DebugActiveProcess")
+	procDebugActiveProcessStop     = modkernel32.NewProc("DebugActiveProcessStop")
 	procQueryFullProcessImageNameW = modkernel32.NewProc("QueryFullProcessImageNameW")
 )
 
@@ -155,6 +156,18 @@ func _DebugActiveProcess(processid uint32) (err error) {
 	return
 }
 
+func _DebugActiveProcessStop(processid uint32) (err error) {
+	r1, _, e1 := syscall.Syscall(procDebugActiveProcessStop.Addr(), 1, uintptr(processid), 0, 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = error(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
 func _QueryFullProcessImageName(process syscall.Handle, flags uint32, exename *uint16, size *uint32) (err error) {
 	r1, _, e1 := syscall.Syscall6(procQueryFullProcessImageNameW.Addr(), 4, uintptr(process), uintptr(flags), uintptr(unsafe.Pointer(exename)), uintptr(unsafe.Pointer(size)), 0, 0)
 	if r1 == 0 {